### energy | radiation:

Light
* All light contains darkness and all darkness contains light
  - form of magnetic energy
  - goes forever, until it is absorbed
  - has a wavelength and frequency
* All light is comprised of various wavelengths which, when divided, provide a spectrum of color
  - electromagnetic waves, the result of electromagnetic induction
  - energy, which is eventually absorbed and turned into heat
  - part of what s called the electromagnetic spectrum
* All light is the archetypal concept of light
  - brightest light in the world
  - white, colors are white light compressed to a greater or lesser degree
  - lights have a parameter, intensity , which expresses the power of each light
* Always leave the lights on at night.
* Every light has a shadow
  - vessels
* Have good bulbs in every light socket, both inside and out.
* IS the act, or energy, of creation.
* Is Ideal for underlining any fabric of fusing to textured fabrics.
* More light also makes rooms appear larger
  - creates more impulses, causing the muscles to close the pupil
  - is needed to see because the eyes adapt to changes in light more slowly
* More light is reflected by bright colors, resulting in excessive stimulation of the eyes
  - required for optimal growth of many plant species
  - shed on sexual behaviour by a branch of mathematics called game theory
  - means less darkness
* More light means more acid, more solidification and smaller pore sizes
  - free electrons where it hit
* Most light affects development
  - attracts moths
* Most light comes from atmospheres
  - earth atmospheres
  - gas
  - lamps
  - matter
  - point sources
  - single sources
  - stars
* Most light contains color
  - different color
  - creates energy
* Most light gives off energy
* Most light has absorption
  - calcium absorption
  - direct effects
  - few fundamental properties
  - mass
  - much energy
* Most light helps bud growth
  - germination
  - weed germination
  - hits horizons
* Most light includes electromagnetic waves
* Most light is absorbed by chlorophyll
  - pigment
  - caused by particles
  - produced by bulbs
  - used by plants
* Most light passes through air
  - corneas
  - dusty air
  - layers
  - retinas
  - substances
* Most light provides energy
  - reaches earth
  - requires for photosynthesis
* Most light shows same spectral features
* Most light takes different paths
* Some light affects behaviour
  - output power
* Some light attracts animals
  - crabs
  - squids
* Some light comes from environments
  - gases
  - lenses
  - contains gases
  - depends on density
  - does pass through translucent materials, but most of the light is scattered
  - has color
* Some light has different charge methods
  - mechanisms
  - patterns
* Some light is absorbed by the primary lens in a refractor
  - beneficial to germination
* Some light is produced by fire
  - fluorescent tubes
  - reflected at the surface
  - released by lamps
  - makes plants
  - occurs in stromas
* Some light passes through crystal
  - diamonds
  - gels
  - ice crystal
  - mirrors
  - slits
  - telescope tubes
  - produces energy
  - provides hide spots
  - reaches eyes
  - reflects radiation
  - shows nebulas
  - lights also use a bulb shield, like a cup in front of the bulb
* Use only lights that have been tested for safety.
* absorbs shadow.
* activates photoreactive drug, releasing agents that destroy only affected cells.
* acts as a signal to initiate and regulate photoperiodism and photomorphogenesis
  - an indicator of energy and the cords as the means of transmission
  - both a particle and a wave
  - like a wave in many ways
  - the same way inside the fibre optic cable used for communications lines
* actually inhibits the growth of stems if there is much blue light present.
* affect surface and patch objects that are in the same axes as the light
  - the brightness of a star just as much as the star
* affects animals in several ways
  - flowering
  - penetration and infection of pines by dwarf mistletoe
  - plants in two ways
  - reproduction in several species through hormonal mechanisms
  - the germination of seeds in various ways according to the species
* also affects molting
  - one's mood
  - plants in other ways
  - behaves as if it consists of discrete particles or quanta called photons
* also behaves like a wave in many contexts
  - wave, and, thus, every photon has a wavelength
  - particles referred to as photons
  - come on at night, making people choose between sleep and household chores
* also creates heat
  - patterns with shadow
* also has a wave nature
  - meaning related to the religious or cultural background of different countries
  - profound effects upon the internal mechanisms of fish
  - includes infrared and ultra violet light on the far ends of the rainbow
  - increase safety and security by illuminating walks and warding off intruders
  - is diffracted when passing through a lens
* also means heat, which means evaporation
  - manifestation
  - plays a part in the germination of many seeds
  - projects upward to produce plenty of light
  - regulates asexual sporulation
  - slows down when it enters glass
  - speeds up transpiration by warming the leaf
  - symbol of the glory which is to come
  - symbolizes a certain kind of character in Kitchen
  - tend to concentrate insects, namely moths
  - transfers energy from place to place
* always comes in identical units of action
  - dispels darkness
  - drives away darkness
  - overcomes darkness
  - penetrates through darkness
  - prevails over darkness
  - refers to consciousness
  - reflects away from a mirror at the same angle that it hits the mirror
  - spirals up
* always travels at the same speed, and is affected by gravity
  - in straight lines
* appear to move when they flash.
* appears as either a particle or as a wave.
* appears in many guises, At times it takes on mysterious disguises
  - seven distinct colors known as a spectrum
* appears to inhibit germination and induce dormancy of seeds
* appears to slow down near a significantly large gravity well
  - when it passes close to a massive object
* are a positive force
  - always bright
  - comparable in effect to miniature suns
  - expensive, and cars have headlights
  - more difficult to place in space
  - motion-activated compact fluorescents
  - solar powered
  - to bright or alkaline water
  - usually a shade of amber
* arises in the east, the direction of the gods.
* arriving from the sun hits the molecules in the air and is scattered in all directions.
* attract many insects.
* attracts Light
  - insects at night
* be the field, Which gives birth to colors.
* becomes color in painting and space the holes in hollowness
  - the conscious medium of our expression as well as the source of our energy
* begins to fade slowly.
* behaves both as a wave and as a massless hunk of energy called a photon
  - as a particle
* breeds starrt to lay at about five months and the heavier breeds at about six months.
* brilliantly glow and flicker in colors of reds, greens, violets, and blues.
* brings sight and penetrates that which is dark.
* can also affect the quality and taste of wines.
* can also be a factor, some seeds germinate better in full light while others require darkness
  - an efficient way to show the passage of time
  - artificial such as light bulbs
  - behave as a particle and a wave at the same time
* can also cause electrical changes to occur in some materials
  - the double bonds to form a ring
  - illuminate a product from behind
  - travel through matter like air, glass, and water
* can be a particle at one point in time and a wave at another point in time
  - both good and bad for photosynthesis
* can be either natural or artifical
  - man-made
  - treated as a wave, so light can experience diffraction
  - begin permeating
* can behave as a particle or as a wave
  - in unfamiliar ways in a photonic crystal
* can behave like a particle and like a wave
  - wave sometimes and then like a particle at a different time
  - bend a beam of light
* can bounce off objects, like a billiard ball hitting the side of a billiard table
  - of whatever it illuminates, to light up something else
* can bounce or absorb depending on the color
  - reflect off of ground surfaces and cause glare and scatter as well
* can cause chemical changes, as seen when plants use light to grow
  - color changes and nutrient losses in foods canned in glass jars
  - discoloration and loss of nutrients
  - disorientation of nesting turtles and hatchlings
  - electricity to be generated, like with a solar-powered calculator
* can cause embrittlement, yellowing and color fading in prints and hand-colored surfaces
  - yellowing, and fading in photographs
  - paper to yellow and ink to fade
  - change into matter and back into light again
* can create moods
  - only particle pairs whose charges sum to zero, since light itself is chargeless
  - damage eyesight
  - degrade chlorine compounds and produce hydrogen, a non-polluting fuel
  - destablize chelates
  - disorientate both the female turtle and the hatchlings
  - either be 'on' a surface or 'through' a surface
  - exist only if darkness exists
* can fade old books and smoke can blacken drawings
  - pigments and cause paper and textiles to become brittle
  - the color of canned foods in glass jars
  - glimmer, gleam, or sparkle
* can go around the earth three times in one second
  - long distances in a fiber
  - through anything
* can have a lot of energy and is able to break chemical bonds
  - profound effect on our bodies and light or a lack can effect our moods thereof
  - heal
  - induce an electrical response in some ceramics, called photoconductivity
* can influence essentially all aspects of orchid plant growth and flowering
  - our behavior as well as our perception
  - interfere with hormone production cycles and reduce the amount of melatonin made
  - lead to changes in colour
* can make a mineral look very dull or as shiny as a diamond
  - and break a photo
  - mean that it is lighter in tasting, light in flavour or light in texture
  - more easily penetrate clear water than stained or murky water
  - move an electron up to an excited state that occupies a higher orbital
  - no longer reach the retina and the animal becomes blind
* can only come after dark
  - go through several feet of water naturally before being absorbed
* can pass through some materials and is stopped by other materials
  - transparent things the most easily
  - penetrate through the eyelids even while the eyes are completely closed
  - provide energy by two fundamentally different mechanisms
  - reveal much about tissue without ever damaging tissue
* can shine brightest in the darkest moments
  - through some solids, such as glass
* can stimulate or inhibit a seed's germination
  - seed germination of some species
  - then pass directly onto the retina, without being scattered
* can travel for billions of years at the same speed without losing energy
  - in a vacuum
* can travel through empty space and through some kinds of matter
  - it, because the fiber is made from glass
* carries away energy
  - energy as if it contains discrete photons or packets of energy
* catalyst for oxidation, which leads to fading and weakening of materials.
* causes a shape change in rhodopsin, which sits on the surface of the cell
  - amphioxus to dig in substratum
  - awakenings and lighter sleep
  - chemical change inpigment, receptor fires, neuron stimulated
  - colors to fade
  - conformational change from cis to trans in the membrane of the disc
  - it to conduct electricity more easily
  - pigment to change shape into a different chemical
  - vitamin A to change shape from the bend cis form to the straight trans form
* certainly has an effect on animal behavior.
* chain allelic exclusion allows a B lymphocyte to make only one type of antibody.
* change from red to green, with no amber, except when moving from green to red.
* clearly plays a physiologic role in plant life via photosynthesis.
* colored clothes absorb less heat than dark colors
  - can make it easier to check for deer ticks
  - make it easier to see ticks as they travel
  - lizards placed on dark rocks become a darker color
* coloured clothes tend to encourage light coloured energies.
* combination of the colors of the rainbow.
* come in white, yellow, red, blue, and green.
* comes from a star's surface
  - very small point and looks like a star
  - above to touch the face and the hands as darkness gathers on the right hand side
  - bask lamps
  - darkness, growth comes from barrenness
  - such a large area that it is hard to tell where it came from
* comes from the burning gases
  - overexposed corona
  - sun and the stars
* comes from the vacuum and reflects off a soap film floating in air
  - off a soap film floating over glass
* comes in both visible and invisible forms
  - many varieties
  - packets of energy called quanta or photons
  - the form of waves, which go up and down much as waves rise and fall in the ocean
  - through cracks and openings in the walls and ceilings
  - on when power goes off
  - out of magnetic poles like lights from a lighthouse
* comes through Venus who receives a triple supply and gives one-third to the Earth
* coming from different places falls on different parts of the retina
  - to Earth from distant supernovas is recorded all the time
* common symbol in the Bible for truth as opposed to ignorance and error.
* concept that seems to permeate almost every religious belief and spiritual practice.
* consequence of the electromagnetic force.
* consists of different colors that can be separated out into a spectrum
  - colors, as seen in a rainbow
  - discrete units, or quanta, of energy known as photons
* consists of electromagnetic waves of a certain band of frequencies
  - fluctuations, or waves, of the electromagnetic field
  - individual particles of energy called photons
  - particles called photons
  - photons, which are essentially tiny packets of energy
  - so many colors
* constant source that is seen in everyday life.
* containing all visible colors is called white light, therefore, sunlight is white light.
  - colors with different wavelengths
  - ultraviolet radiation
* contributes to the vision of form.
* controls many plant processes
  - the development of plants
* converges when it passes through a convex lens.
* crazing under glaze comes with age.
* creates a double world of shadow
  - play of shadows and reflections
  - physical clarity and spiritual harmony
  - space, changing light is changing time
* critical limiting factor in photosynthesis.
* decreases from forest perimeters into the interior.
* defines an object s color.
* delivers energy in little packets called photons.
* demonstrates existence of a spectrum.
* destroys the diazonium salt.
* deter females attempting to nest.
* deteriorates textiles.
* dies at some time, when the wick burns out, or the oil runs out, or the lamp cracks.
* dilute appaloosas have a cream coat with light brownish spots.
* diminishes exponentially over distance according to the inverse squares law.
* dispels all darkness
* disrupts the normal circadian rhythms and signals the body that it's time to wake up.
* dissolves darkness.
* divides the universe into two.
* does have an absolute speed
  - more damage than either water or fire
* drives the interconversion of two forms of phytochroms.
* eliminate dark spots and shadows around the home, reducing hiding places for intruders.
* emanates seven major rays that have varying wavelengths.
* embraces light as it sees past the illusion of darkness.
* emits energy
  - heat energy
  - more heat energy
* emitted by fireflies is unique
  - oxygen is seen as blue, by hydrogen as green, and by nitrogen as red
  - the sun, by a lamp, or by a candle flame is unpolarized light
  - from the object is refracted at the water and air interface
* enables things to grow.
* encourages growth
* enhances coloration
  - protein synthesis
* enters eyes
  - human eyes
  - regions
* enters the body through the eyes and skin
  - cornea and is projected onto the back of the eye after passing through the lens
* enters the eye and an image is focused on the retina
  - forms images
* enters the eye and is focused onto the retina
  - upon the retina, where the rods and cones are stimulated by it
  - sharply focused on the retina
  - through a hole called the pupil
* enters the eye through the clear outer dome, the cornea, and goes through the pupil
  - pupil, and the pupil is made larger or smaller by the iris
  - eye, and then passes through to fall on the retina
  - eyes through the cornea
  - front of the eye through a hole in the choroid coat called the pupil
  - retina and from there travels directly to the pretectal area
  - through a central opening called the pupil
* enters through the cornea, a transparent dome on the surface of the eye
  - passes through the pupil and the lens and strikes the retina
  - eye's covering, the cornea, and passes through the lens
  - front of the eye called the cornea
* enters through the pupil and goes through the lens , which focuses the image on the retina
  - is focused by the lens into an image on the retina
* excites electrons within the zinc sulfide, causing it to emit blue-violet light
  - the molecule into the cis form
* exercise each day can help to maintain function of limbs and decrease problem behaviors.
* exerts a definite influence on a fish's metabolism, maturation, behaviour and colouration.
* exhibits both particle and wave characteristics.
* exists in tiny packets called photons.
* expels dark-ness.
* experiences a moving medium as an effective gravitational field
  - red and blue shifts as a light's source moves
* falling down onto the Earth s surface is blue-shifted since it increases in energy.
* falling on a pixel is converted into an electrical charge signal
  - an object is somewhat like rain falling on the ground
  - objects, is redirected in another direction
* falls from the western sky
  - in a gravitational field just as do material objects
* falls on a three dimensional object and creates a shadow
  - the shell and makes it shine from within
* fills the atmosphere of earth, fills the surface of earth, fills the magma of earth.
* fittings Portable lighting devices.
* flash and circuits crackle when they fire and make hits
  - in buildings that have been un used for many years
* flicker off and on during the night.
* flows in everywhere.
* focuses behind the retina, causing blurriness, because the eye is too short.
* force by which all things become visible.
* form of electromagnetic energy
  - radiation emitted by the sun and the stars
* form of electromagnetic radiation that is visible to the human eye
  - propagates as a transverse wave
* form of energy known as electromagnetic energy, also called electromagnetic radiation
* form of energy that arrives on Earth in little packets called photons
  - behaves like the waves in water or radio waves
  - can be released by an atom
  - is part of a much bigger family called the electromagnetic spectrum
  - travels in waves
  - to which our eyes are sensitive
  - which travels in small, invisible waves
* form of energy, called radiant energy
  - so the chlorophyll is able to harvest the sunlight with little waste
  - intelligence
  - radiation and it travels in waves
* frequently behaves as a particle.
* frosts only, and none when very young.
* generate heat that increases room temperature.
* generated by laser printers can cause eye injury.
* generates a gentle heat that attracts fleas
* gets bent as it goes from air to glass to air
  - to the pixels after reflecting at the mirror
* give lives and architecture robs a energy of lights.
* gives any surface an extra dimension
  - energy to electrons in the photographic film
  - it energy to be ready to snap onto another atom
  - plants the ability to make their own food through the process of photosynthesis
* glows within waves that roll inside a narrow chamber.
* goes into the owl's eyes and hits the rod cells.
* grows and produces living fruit - goodness, righteousness and truth
  - capability
  - color components collectively known as the spectrum
* has different colors because it has different energies
* has energy and that energy can be converted to heat and other forms of energy
  - associated with it
  - inherent capability to touch spiritual side of people
  - lesser effects
  - nothing to do with space
  - penetration capability
  - positive effects
  - potency
  - qualities of both waves and particles
  - significant effects
  - soften effects
  - wave-like properties
  - waves, and the length of the wave, from crest to crest, determines the color of the light
  - weight
* have a severe drying effect on plants
  - transformation matrix that describes the space in which they are positioned
  - different colour temperatures
  - two uses, to see and be seen
* heats water.
* helps bacteria make important lifestyle decisions
  - birth a new universe, and blessing helps birth another world, the world of our people
  - healthy harvest
  - stimulate a child's residual vision
* high frequency.
* higher octave of the same life-force principle.
* hits a surface and reflects the color of that surface
  - rhodopsin, retinal changes shape to trans, rhodopsin breaks down
* hits the disc, is reflected and measured by a photo diode
  - droplets of fog or rain and scatters
* hitting that screen creates chemical reactions in nerve cells within the retina.
* however is an important factor in seed germination and the growth of healthy seedlings.
* hushes light.
* illumines rooms of darkness.
  - sections
  - the physical, mental, emotional, social, and spiritual health
  - various skulls, auras, sceptres, and rods
* increases effectiveness
  - the rate of dissipation of hypobromite formed from the added bromine
* induces oxidation and form oxides of sulfur and sulfuric acid in the presence of humidity
  - responses
* influences development
  - health because it affects the physiologic or physical functions of the body
  - plants in other ways than through photosyn- thesis
  - the seasonal abundance of phytoplankton and also their vertical distribution
* infuses life into buildings.
* insists that objects remain solid, and so very far apart.
* involves in photosynthesis
  - magnetism
* is Affected passing through water e.g. viewing objects under water, formation of rainbows
  - Life and darkness is Ignorance
* is absorbed and funneled to reaction-center chlorophyll a
  - reflected by pigments
  - trasnferred to reaction center chlorophylls
  - as it enters an opaque medium
  - photosystems in the thylakoid membranes of chloroplasts
  - rhodopsin and metarhodopsin in invertebrates
  - the sensory cells in the outer layers of the retina
  - exponentially as it passes through water
  - through the eyes as well as through the skin by our sensory nerve endings
  - when it travels through a transmitting medium
* is actually a form of energy
  - sequence of vibrations
  - energy, electromagnetic energy to be exact
  - albums
  - all our eyes can really see
* is also a consideration when storing wine
  - good attractant when used at night
  - qualum
  - source of relaxation
  - symbol of hope
  - an anathema to fungi
  - essential for the survival of most animal species
  - important for coral reef growth
  - in harmonics of two's and the bioenergy is enhanced also by harmonics of two's
  - metaphor for the untiring watch over the dying
* is also the cause of beauty
  - emblem of knowledge
  - secret ingredient in fashion photography
  - very attractive, most individuals arriving about two hours after dark
  - always a wave and never anything else
  - an electro-magnetic wave, just like the signal emitted by police radar speed cameras
* is an electromagnetic disturbance
  - phenomenon, just like microwave waves, X-rays or television waves
* is an electromagnetic wave and can travel through the vacuum of outer space
  - because it is made of electric and magnetic waves
  - just like radio waves
  - that is transmitted in short pulses of energy
* is an electromagnetic wave, like a radio wave, only at a much higher frequency
  - with separate electric and magnetic components
  - element
  - energy source that behaves like a wave
* is an essential form of energy
  - part of life in the ocean
  - resource for all photoautotrophic organisms
  - existing thing, but darkness is nonexistent
* is an expression for distinguishing pure and defiled
  - of thought
  - image used often in Scripture
* is an important component of color
  - cue for release and settlement of tadpole larvae
* is an important environmental factor in plant propagation
  - stimulus that induces conidiation in Aspergillus nidulans
  - factor in determining the makeup of aquatic populations
  - oscillation of magnetic and electric fields
* is another example of waves
  - physical condition of the environment that is very important to all living things
  - applied to the photoconductor, which increases the material's conductivity
* is as effective as antidepressant medications, perhaps more so
  - prevalent as plastic
  - available where nutrients are scarce, and vice versa
  - bad for vampires
  - believed to have characteristics of waves and particles
* is bent back from the surface of an object to the eye, forming a reflection
  - by large gravitational fields
* is bent when it passes between substances having different densities
  - from one medium such as air, into another, such as water
  - born of darkness and peace is born of war and chaos
* is both a wave and a particle
  - spirit and matter, so that everything is really a form of light
  - bounced, separated into different colors, and recombined to make white light
  - brighter than normal and dark is darker
  - called light because that is what it is
  - capable of travel
* is captured by pigments which absorb photons of certain wavelengths
  - in the paint layers so the layers glow
* is caused by accelerating electrically charged particles
  - classified into many different wavelengths or parts
* is composed of electromagnetic waves which travel independent of a medium
  - finite 'particles' of space in motion through time
  - infinite 'waves' of time that flow into space
  - packets of electromagnetic energy called photons
* is composed of particles called photons
  - that have mass, etc
  - photons , which have no antiparticle
  - waves that vibrate at different speeds
  - conditions
  - connected to seeing and viewing, light informs atmosphere and the meaning of spaces
  - created and destroyed in electron transitions in the atom
* is created by lamps
  - movement
  - vibration of energy
  - critical to growth
  - dependent on the weather, the season, the time of day and geography
  - described both as wavelengths and photons
* is different from darkness
  - sound
  - diffracted by ultrasonic waves in a liquid
  - dimmed by proximity to shadow-producing obstacles
* is directed downward towards the plants
  - from a light source away from the pool through the fibers
  - distributed throughout the galaxy
  - electrical and fiery
  - electromagnetic and sound is pressure
* is electromagnetic energy and all forms of electromagnetic energy can be converted to heat
  - that travels through space in straight lines
  - radiation as well, but of a higher frequency
* is electromagnetic radiation that comes in waves, the basic units of which are called photons
  - is in the form of a wave
  - with a wavelength that is visible to the eye
  - within a certain portion of the electromagnetic spectrum
  - radiation, measured in wavelengths
  - electromagnetic, as well
* is emitted along parallel rays from an infinite distance away
  - by a light bulb
  - from every point on an object in all directions and travels in straight lines
  - in the form of small packets called photons
* is emitted when atom relaxes to ground state from excited state
  - nitric oxide reacts with an oxidant
* is energy that moves through space and can be thought of as either waves or particles
  - traveling at myriad frequencies, playing with our eyes and hearts
* is energy, and in general relativity energy is affected by gravity just as is mass
  - it can be used in many ways
  - of course
  - especially harmful to works on paper
* is essential for chlorophyll manufacture
  - the earth, for all creation
* is essential to life
  - the first stage of photosynthesis
  - eternal and darkness is fleeting
  - everything in photography
  - everywhere, and all activity is visible
  - expensive to measure accurately
  - filtered, as is the air
  - focused by reflections from a large primary mirror and a smaller secondary mirror
* is focused while passing through the cornea so sight can occur
  - focused, or refracted, by the cornea, the clear front window of the eye
  - focussed on the retina
  - frequently a symbol of eternal hope and assured victory
  - friends
  - from solar powered lights
* is fundamental in architecture
  - to vision - perhaps the most important of all our senses
  - generated using devices such as the light emitting diode and the laser
* is given by sunlight energy
  - off as the result of atoms within a substance being given energy
* is good and redemption, while darkness is regarded as bad and misfortune
  - because it brings life and blessing
  - harmful to milk
  - illumination
  - imaged onto the retina by the lens
  - imagined as dispelling the darkness of ignorance
* is important because certain plants require more of it than others do
  - it helps maintain healthy green leaves
* is important for clam growth and only mild water cloudiness can be tolerated
  - good vision
* is important for the plant to grow and produce new leaves and roots
  - tiny seed to grow
* is important to all living things
  - life and component in many life processes
  - observe the patient's condition
  - in conflict with the atmosphere while fog and cloud shadow a brilliant sheen of snow
  - incident normally on a crystalline plane-parallel plate of thickness d
* is incident on a plane mirror
  - the cathode
  - indeed a powerful cue that can reset the body's circadian rhythm and tell it to wake up
  - indispensable for the proper functioning of the eye
  - information, energy and love
  - inhibitory to oospore formation but stimulatory to oospore germination
  - insight
  - intensified and objects are illuminated
* is just a small portion of the electromagnetic energy spectrum
  - like radio waves in the way that it can also carry information
  - one portion of the various electromagnetic waves flying through space
  - less dependent upon material form than any other natural manifestation
  - life and more light means more life
  - life, when darkness is death and life is heaven, as darkness is hell
  - light, darkness is darkness
  - like salt because salt consumes itself, just as a candle burns itself down
  - likely the ideal carrier of quantum information
  - living, darkness is dead
* is located in attics
  - carnivals
  - closets
  - concerts
  - desks
  - fridges
  - oceans
  - planes
  - porchs
  - universes
* is made by accelerating charges
  - wiggling electric charges
* is made of discrete packets of energy called photons
  - little bits called photons
  - many small pieces, called particles
* is made of waves like the waves in the ocean
  - of different frequencies
* is made up of all the colours of the rainbow
  - electric fields and magnetic fields, hence called Electromagnetic waves
  - energy waves which are grouped together in what is called a spectrum
* is made up of little bits of energy
  - tiny little particles called photons
  - waves called electromagnetic waves, but they are all invisible to our eyes
* is made up of waves of different sizes
  - entwined electricity and magnetism
  - meant to be visible
  - measurable with nanoseconds or billions of seconds
* is measured in Angstroms
  - units called foot candles
  - modulated and transmitted over high purity, hair-thin fibers of glass
* is more fundamental than space-time
  - time and space
  - powerful than darkness because one ray of light penetrates the dark
  - most necessary in order for photosynthesis to take place
  - movement, vibration, heat, fellowship, communion, revelation, is itself life
  - music, and music washes away from the soul the dust of every-day life
* is necessary for germination
  - photosynthesis, a process that produces oxygen
* is necessary for the electrons to be boosted from the pigments
  - formation of anthocyanins
  - so that matter can manifest itself and be visible
* is necessary to life
  - sustain virtually every form of life on the planet
* is needed by a plant for using nutrients and manufacturing food
  - in a spiritual sense in order to see the effects and dissolve mystery
* is needed in order to see things
  - stimulate sight
  - neither particles nor waves in the classical sense of the terms
  - nonionizing over many wavelengths and is known to function well as a medical probe
* is now a widely used therapy for sad and milder forms of depression
  - for sad therapy and milder forms of depression
  - nuclear energy
* is of no use when the soul itself destroys it and prefers to stay in constant darkness
  - one wavelength and comes from one source that gives a consistent phase
  - often a factor limiting the growth of orchids
* is one form of electromagnetic energy
  - of our body's most powerful time cues
* is one of the biggest factors in choosing a colour
  - deadliest enemies of paintings, prints and photographs
  - factors that controls where organisms are found in the ocean
  - human body's vital elements beside air, water and food
  - main factors influencing establishment and development of many forest species
* is one of the most important environmental cues for plant development
  - external signals
  - factors affecting the structure, growth, and behavior of plants
  - signals providing critical information to biological systems
  - rate limiting factors for photosynthesis
  - small part of the spectrum
  - the most important dynamics for life
  - type of electro-magnetic wave
  - only one type of electromagnetic waves
  - our primary means of sensing our surroundings
* is part of electromagnetism
  - many of our spiritual traditions
* is part of the electromagnetic spectrum, which ranges from radio waves to gamma rays
  - subtle energy body of each person, flowing in the chakra and meridian systems
  - particulate, light is also wavy
  - perhaps the most profound truth in the universe
  - polarized by reflection
  - positions
  - possibly the single most important factor in dew production
  - precious, and excess heat is hard to remove
  - prevented from reaching the retina and vision is impeded
* is probably the most essential factor for house plant growth
  - single most important factor affecting bay grass growth
  - produced as a result of a chemical reaction
* is produced by bulbs
  - oxidation of luciferin which is catalysed by the enzyme luciferase
  - passing electric current through a thin wire filament, usually of tungsten
  - the same way as other fluorescent lamps
* is produced when an electric current passes through the mercury vapor
  - plankton organisms are disturbed with no correlation to weather or sea state
  - projected into a beam by a precision acrylic lens
  - provided by some spherical fruit which bear the name of lamps
  - radiant energy - energy travelling through space
  - reduced at the soil surface and the soil becomes better able to retain water
* is reflected and refracted differently through clear plastic than other materials
  - at the same angle that it strikes the mirror
  - back to the sensor by the surface of the fluid
* is reflected by the earth and from the moon's own pale surface
  - surface of the crystals and makes snow appear white
* is reflected from all points on a mirror , as shown in the diagram that follows
  - outside objects through the hole
  - the Earth to the Moon and back to the Earth as earthshine
* is reflected in a single direction
  - all directions from particles in colloids
  - into a series of small parabolic troughs
* is reflected off of a piece of paper
  - the surface of a windshield at a low angle
* is reflected off the mirror at exactly the same angle as it hits the mirror
  - surface and scattered by particles within the water
  - refracted or absorbed
  - when it falls onto a shiny surface
* is refracted by passing through a lens, water, or the atmosphere
  - through the Earth's atmosphere into the cone of darkness
  - when it crosses the interface from air into glass in which it moves more slowly
  - required for photosynthesis, but too much light can be harmful to algae and plants
* is said to be energy and fame and has an upward motion
  - unpolarized if the direction of the electric field changes rapidly and randomly
  - scattered by the air at sunset, casting beautiful reds and oranges on the clouds
  - scattered, causing blurred, hazy vision
  - scenes
  - security, safety
  - seen by the eyes and touch through the wind element
  - sent to the whole earth
  - shone through the ganglion, and the amount of light that passes through is recorded
* is simply electromagnetic waves of a certain range of frequencies
  - the one form of radiation our eyes can see
  - simultaneously a wave and a particle
  - slowed down in transparent media such as air, water and glass
* is something always noticed in darkness
  - which travels very quickly
  - strong enough to candle the largest hookbill eggs but produces no heat
  - stronger than darkness
  - subtle in effect, fast moving and penetrates deeply into all the cells of the body
  - symbolic in different ways and in different countries and religions
* is symbolic of Torah
  - knowledge, goodness, and purity
  - synonymous with creativity
  - technically a form of electromagnetic energy
* is that by which things become known
  - entity which, permits vision with the help of eye
  - illuminates the film and is projected on a white screen
* is that part of the electromagnetic spectrum that our eyes can detect
  - spectrum of electromagnetic radiation that the human eye can see
  - superterrestrial, natural force under which all life on Earth originates and develops
* is the beginning of time and the end of the end
  - building block of matter
  - burden that they bear
  - cause of darkness, and movement is the cause of stillness
  - constant in our physical world
  - core concept of spirituality
* is the energy supply for photosynthesis
  - that allows the balance to be created equally
  - essence of photography
  - evidence of motion, the trace of gesture
  - existence for life
* is the fastest thing in the universe
  - there is, and nothing else travels as fast as light
  - force that enables the interaction of time with space
* is the key element in photography
  - to photography
  - life of death
  - magic that makes a photograph happen
  - main source of energy for organisms
* is the medium of life and a powerful yet gentle agent for healing
  - through which all things spin and swim
* is the most ancient object of all things created
  - convenient form of energy to make molecular devices work
  - important factor affecting seagrass
  - limiting factor in orchid culture
  - obvious form of radiation arriving at earth
  - movement of energy through space in the form of electromagnetic waves
  - oscillations in the electric field
  - other side of darkness
  - part of the spectrum that stimulates the eye's retina, resulting in sight
  - predominant symbol in the expression of the Christian faith
  - presence of energy
  - primary fact of our existence
* is the primary resource for which plants compete, followed by water and nutrients
  - of a photographer
  - source of energy to almost all ecosystems
  - synchronizer of circadian rhythms
  - range of the electromagnetic spectrum that stimulates the retina and enables sight
* is the source of all power
  - photographic descriptions
  - substance of the day, and the absence of it causes night
  - subtlest of all material substances
* is the symbol of Israel's mission
  - knowledge, of wisdom, of learning
  - life, happiness and beauty
  - the divine in humanity
  - ultimate factor that is going to influence growth
  - universal energy with which our minds create
  - visible form of electromagnetic energy
* is the visible part of a very long electromagnetic wave spectrum
  - very wide spectrum of energy
  - spectrum portion of electromagnetic waves
  - therefore a very important factor in determining the true color of rubies
  - thought to consist of an infinite number of oscillating electrical and magnetic planes
  - thus the energy by which coarser matter is changed to finer
  - to illuminate, to bring things clear, into vision
  - transmitted through transparent medium such as glass
  - transported in descrete bundles called photons
  - trapped by a special pigment in the leaves
  - travelling, say in air, in a straight line when it hits a different medium, say a mirror
  - unique in that it behaves like both a particle and a wave
* is used as a carrier of information or energy
  - disseminators of energy
  - energy for making food, a process called photosynthesis
* is used by plants both for photosynthesis and as a developmental cue
* is used for illumination
  - reading
* is used to communicate in the movies
  - create an electrochemical gradient of protons
  - emphasize the environmental values of Helsinki nature, sea, and architecture
  - etch patterns on silicon chips
  - improve human health, a field of medicine known as photomedicine
  - make the clues observable
  - replace the shadow-edge of a gnomon
  - useful in detection schemes and in signaling a change of state
* is usually drastically lower in quality and quantity
  - the limiting factor from dusk until dawn
  - utterly distinct from darkness
  - very important to astronomers
  - visual signals
  - vital for the survival of the life force
* is what brings our world to life
  - enfolds all the universe as well
  - photography is all about and it is the purpose of the camera
  - transforms the food into energy they use to metabolize
* keeps rabbit from getting bored and depressed.
* key factor in growing healthy orchids
  - ingredient in photosynthesis
* kind of energy that can travel through space
  - moves from the sun to the Earth
  - radiates, or travels, in waves
  - wave on the Electromagnetic Spectrum
* layering with the color pencil is what gives the illusion of depth and life to a drawing.
* leaking through closed blinds in a dark room can create images of the sun on opposite walls.
* leaves a diamond and enters water
  - the surface of a star or planet, travels a great distance, and finally enters our eyes
* life-giving source.
* limiting factor in plant growth.
* loses energy as it passes the gravitational fields of stars.
* major factor controlling photosynthesis
  - symbol representing spiritual growth
* make the difference at night.
* makes fire
  - it easier to see people and things
  - plants grow tall
  - shadow and the shadow makes 'depth' in a scene
* makes up a relatively small part of the spectrum
* means half the fat or one-third the calories
* microscope Two important concepts in microscopy are magnification and resolving power.
* mixture of particles and waves.
* moves away from an object in all directions
  - faster than anything else in the universe
  - into the eye through the pupil , a hole that is made smaller or larger by the iris
  - more slowly through a transparent material medium than through a vacuum
  - out from the source as a wave
  - slower in glass
* moving skyward mean the temperature's rising.
* naturally acts as an important factor in animal distribution directly.
* necessary part of the process of photosynthesis - light is crucial for plant growth.
* needs darkness and darkness needs light.
* night light bulb.
* normally bounces around in all directions, much like someone shaking a rope
  - travels twenty million times faster than that
* occurs when an electron beam stimulates a phosphor.
* often implies holiness, purity, and righteous
  - seem to have a spokelike appearance
* only penetrates the upper hundred, sometimes even only the upper ten meters of the water
  - pretends to obey the laws of physics
  - reflects from a mirror, so the glass can have internal imperfections
* oscillates back and forth between the mirrors and continually increases in intensity.
* part of a continuum of radiation or energy waves
* passes first through the cornea , pupil , lens and then focuses on the retina
  - from top to bottom, through the retina to the rods and cones
  - most optimally through a diamond that has no inclusions
  - readily through the fluid
* passes through a block of glass with parallel sides
  - thin film and is projected on a screen
  - vacuum freely, without obstruction or change
  - it without being absorbed as much as when it was colder
  - several lens systems that magnify and resolve the object being observed
  - some things, like glass and air and water, and most of it goes through
  - the collimator and is focused on a refracting or diffracting material
* passes through the cornea and into the pupil behind it
  - is reflected on the receptor cells of the retina
  - then through a hole, called the pupil
* passes through the cornea, pupil and lens before hitting the retina
  - pupil, and retina before hitting the lens
  - eye and focuses onto the retina
  - lens of the eye and is focused on the retina
  - opening in the iris called the pupil
  - pupil into the eye
  - retina when it enters our eyes
  - vacuum of space
* passing through a lens takes advantage of the varying speed through the medium
  - prism is refracted or divided into the colors of the spectrum
* passing through the atmosphere is refracted into the shadow and illuminates the moon
  - object is affected by attenuation and refraction properties
* penetrates atmospheres
  - deep into the clear water, reflecting a cool blue color
  - only to the mesopelagic zone
  - ozone layers
  - seawater
  - shallow water
* plays an even more important role for birds than for humans in metabolic control.
* plays an extremely important role in the operation of a compound microscope
  - the production of plant material
  - important role in retention of leaves on the plant
* plays an important role in the life of all organism
  - spiritual life of a Kabbalist
  - off the colors with an energy that only comes from nature
* possesses angular momentum which is independent of polarisation.
* powered by batteries emit bright, natural light, which is directed to the eyes.
* powerful substance
  - symbol for people of different faith traditions from all over the world
* primary factor for growth in pelagic ecosystems.
* probably helps serotonin synthesis.
* produced by nuclear fusion in the core travels out in the shell called the radiative zone.
* produces different effects at different frequencies
  - enough heat
  - every kind of goodness and justice and truth
  - leafy growth
  - leggy growth
  - life, growth and beauty, while darkness brings decay and ruin
* promotes synthesis.
* propagates itself, dispels darkness.
* provided by the moon can create unique and even eerie images.
* provides energy for photosynthesis , which produces the primary food source for the river
* provides sufficient energy
* provides the energy source necessary for plants to manufacture food
  - needed for plants to manufacture food
  - that plants use to manufacture food
  - to excite electrons
  - source of energy for both processes
  - warmth, and, as fire, it both destroys and cleanses
* pruning immediately after flowering helps promote compact growth and more flowers.
* quantum-mechanical phenomena.
* radiates out in all directions.
* reaches all objects from all directions at the same speed, regardless of their motion
  - floors
  - forest floors
  - the brain through the eye and helps to control our internal clock
  - woodland floors
* reflect off mirrors as well.
* reflected by carotinoid pigments appears yellow or yellow-orange to our eyes
  - the retina stimulates the pineal gland
* reflecting off lens surfaces diminishes light transmission and image quality.
* reflects from a mirror at the same angle as it arrives
  - surrounding trees or rocks, making even indirect light a source of danger
  - the first and second layer of soap film
* reflects off air molecules and lights up the dark sides of objects
  - each point of an object and travels out in all directions
  - of lighter colors better, as white composition of the visible spectrum
  - on water the way emotions wash over the heart
  - the same way off a mirror
* refuse wood, used as fuel.
* replaces darkness.
* represents electromagnetic waves of a certain wave length
  - intelligence, and darkness represents undeveloped capacity
  - truth, knowledge and holiness
* resets the body's rhythms or biological clock in a more powerful way than melatonin.
* rises and falls, drifts and wanders, cascades and sparkles
  - from the darkness, bringing forth life from the dark earth
* saturate at lower levels.
* scattered by the suspended material is detected by a photocell.
* scatters darkness and life banishes death
  - off any perturbation on the surface of the waveguide
* search engine which retrieves both Web sites and articles from magazines and newspapers.
* seems to influence our appetite, sex drive, and temperature
  - permeate every place, and darkness begins to fade
  - propagate like a wave and exchange energy like a particle
  - travel in rays or beams
* sends messages to the brain and balances out circadian rhythm.
* serves to generate reducing power that is used to fix carbon dioxide.
* shine from ceiling to floor or wall to floor.
* shines from earth into the universe
  - the center of earth into the universe
* shines the brightest in the darkness
  - midst of the greatest darkness
* shining into the sky causes light pollution
  - on a semiconductor can initiate a chemical reaction with species in solution
  - through the different colors of stained glass creates a warm glow
* shows features
  - in the sky
* signify hope and safety.
* simply has no rest mass.
* slows as it passes through a medium
  - down any time it travels through a dielectric medium, such as water or glass
* slows down when it encounters matter
* somehow can act like one or the other depending on circumstances.
* sometimes behaves like a particle and sometimes like a wave.
* speeds the dye's activity, which destroys insect cells.
* stimulates germination
  - our primary sensors, our eyes
* stimulates the breeder's reproductive system resulting in breeding
  - formation of a penetration peg that enters a closed stoma
  - hypocotyl to straighten, raising the cotyledons and epicotyl
  - opening of the stomata at daybreak
  - photoreceptors to have action potentials and release neurotransmitter
  - synthesis of a plant hormone that responds to light
* stream of energy particles, called photons.
* stretching before and after an activity can help prevent muscle soreness.
* strikes surfaces.
* strikes the retina and starts a series of chemical reactions that causes a nerve impulse
  - before it can come to a sharp focus
  - rods and cones in the back of the eye and a chemical reaction occurs
  - surface of one side of a thin sheet of material
* striking a silicon semiconductor causes electrons to flow, creating electricity.
* struggles against darkness.
* suppresses melatonin production
  - secretion in humans
* sustains development.
* switches spark to make the only heat.
* switches, electric motors and other electrical equipment can ignite dust or flammable vapors.
* symbol of knowledge of divine truth
* symbolizes knowledge, and darkness, ignorance
  - the warmth, i.e., the love and affection, the quality of the heart
  - wisdom as contrasted to darkness which symbolizes ignorance
* takes time to travel from the star to the creature
  - up space
* tells animals when to mate, migrate, or hibernate.
* tends to bounce off of shiny objects more so than dark opaque objects.
* then focuses properly on the retina, resulting in clear vision.
* thing , and it travels from one point to another.
* thing, made up of particles or waves.
* throw their light as far as it can go.
* thus travels parallel to the axis, creating little pulse dispersion.
* too manifestation of ether.
* transforms into heat
  - the rhodopsins to a stable intermediate
* transport of energy.
* transverse Electromagnetic Wave
* traveling through a diamond is reflected if it strikes a surface outside the critical angle.
* travels about a million times faster than sound
  - one foot every nanosecond
  - across space in the form of waves
* travels along a geodesic path between two points in spacetime
* travels as a wave
  - at a certain speed through space
* travels at a constant speed for any observer
  - velocity regardless of the motion of the object that is measuring it
  - different average speeds through different materials
* travels at different speeds in different materials
  - through different media
  - infinite speed
  - the speed of light
  - away from that person at the speed of light
* travels faster in thin air than thick air
  - water than in air
* travels faster than sound, that is why some people appear bright until they talk
  - forward, raytracers trace backwards
  - from the sun in waves at thousands of miles per second
  - in a motionless liquid with a particular velocity w
* travels in a straight line and a shadow ends where the light rays clear the top of the object
  - as long as nothing disturbs it
* travels in a straight line through space-time
  - the pupil to the retina
* travels in a straight line until it interacts with an object or material
  - it strikes an object
  - path, rather than going around the Earth
  - wave form
  - dielectric materials at speeds that are lower than in air
  - packages called photons, which have properties resembling both waves and particles
  - straight beams penetrating the dark, it passes through itself and through sunlight
* travels in straight lines but bends when it hits another transparent medium
  - within a material
  - lines, unless it reflects or refracts
  - up and down 'wave' motions called a transverse waves
* travels in waves like water
  - of frequency and as particles of matter
  - that scientists call wavelengths
  - waves, much like ripples on a pool
  - like a wave, but hits like a particle
* travels more slowly through materials that are said to have a large 'refractive index'
  - some materials than others
  - only slightly slower in other media
  - slower in different mediums, just like sound
* travels slower through other mediums, such as air, glass and water
  - water than through air
* travels the same speed in all reference frames
  - reletive to everything
* travels through a given medium in a wave-like form
* travels through air in straight paths
  - with little scattering
  - air,space and clear materials like glass and water
  - ice faster than it travels through water
  - light pipe, to the photocathode
  - space as waves of different lengths
  - until it strikes an object
* travels very directly, in straight lines
  - rapidly, but it does have a finite velocity
  - well through the vacuum of space
  - well through air or glass, but poorly through substances like wood or metal
  - with the velocity of light
* triggers episodes
  - the hypothalamus, which triggers the pituitary
* turns slate gray, or black, changes shape
* two-dimensional quantity.
* type of electromagnetic radiation
  - wave that causes a visual sensation when it strikes the retina
* type of energy called electromagnetic radiation, which travels in rhythmic waves
  - known as electromagnetic radiation
  - wave, so is sound
* undergoes refraction.
* uses electricity
  - forces
* usually travels in straight lines, unless it encounters the edges of some material.
* very common cue used by circadian pacemakers to keep time
  - import part of keeping birds
* vibrates to the frequency of two, and dark vibrates to seven.
  - form energy
* wave of electromagnetic energy
  - vibrating electric and magnetic fields
  - or a particle, it moves in a straight line, or it moves in curved space
* wave that can travel through space
  - is made out of patterns of electric and magnetic force
  - travels through the vacuum of space
  - too, and the same thing happens when objects move by one another
* wave-train of electromagnetic radiation.
* wear to the metal where the leaves rub against the findings.
* when reduced to the speed of sound, is the word made flesh where our love be bound
  - treated as particles, is named Photon
* woollens in the evening during summer and heavy woolens during winter.
+ Black hole, History: Stars :: Astrophysics
  * Light always travels at the same speed, and is affected by gravity. If it seems to change speed, it is really traveling along a curve in spacetime.
+ Cycloaddition, Reaction mechanism: Chemical reactions
  * Light can also cause the double bonds to form a ring. After the electron is promoted to the higher orbital, orbital symmetry allows the reaction to proceed in a suprafacial-suprafacial manner. An example is the DeMayo reaction. Another example is shown below, the photochemical dimerization of cinnamic acid.
+ Dance Dance Revolution: Music video games
  * Players can choose between three levels. They are called light, standard, and heavy. Light is easy and heavy is hard. On some of the newer games, there is a beginner mode, which is very easy, and a challenge mode, which is very hard.
+ Electrocyclic reaction, Excited state electrocyclizations
  * Light can move an electron up to an excited state that occupies a higher orbital. The excited electron will occupy the LUMO, which has a higher energy level than the electron's old orbital. If light opens the ring of 3,4-dimethylcyclobutene, the resulting electrocyclization would be occur by a disrotatory mode instead of a conrotatory mode.
+ Freerunning sleep, Scientific experiments: Sleep
  * Light is the most effective signal. Some animals are quite easily entrained by the timing of meals. Exercise is a signal for some animals. Heat is not effective.
+ Fresnel lens: Physics
  * The design allows the construction of lenses of large aperture and short focal length without the weight and volume of material that would be required in conventional lens design. Compared to earlier lenses, the Fresnel lens is much thinner. More light can pass through. Lighthouses that use these kind of lenses can be seen from farther away.
+ General relativity: Basic physics ideas :: Relativity :: Albert Einstein
  * The Shapiro delay. Light appears to slow down when it passes close to a massive object. This was first seen in the 1960s by space probes headed towards the planet Venus.
+ Light, About light
  * Light moves in a straight line, creating shadows when the path of light is blocked. More solid things will have a darker shadow, things that are more clear have a lighter shadow, and transparent things will have none or very little shadow. Light can pass through transparent things the most easily.
+ Microscope, Types of Microscopes
  * There are many different types of microscopes. The most common are compound light microscopes and electron microscopes. Compound light microscopes reflect light under the object being looked at. Light then passes through two lenses and makes the image bigger. Electron microscopes come in different types as well. This is then magnified onto a television screen. Scanning electron microscopes also fire electrons at the object, but in a single beam. This is read and magnified onto a screen.
+ Optical fiber, How it works
  * Its shape is usually similar to a cylinder. In the center, it has a 'core'. Around the core is a layer called the 'cladding'. The core and cladding are made of different kinds of glass or plastic, so that light travels slower in the core than it does in the cladding. If the light in the core hits the edge of the cladding at a shallow angle, it bounces off. Light can travel inside the core and bounce off of the cladding. No light escapes until it comes to the end of the fiber, unless the fiber is bent sharply or stretched.
+ Optics
  * While optics is an old science, new things are still being discovered in it. Scientists have learned how to make light travel through a thin optical fiber made of glass or plastic. Light can go long distances in a fiber. Fibers are used to carry phone calls and the Internet between cities.
+ Photocatalysis: Chemistry
  * Photocatalysis' is using light as a catalyst to increase the rate of a photoreaction. Most known photoreactions begin when light creates a free radical in the reaction system. Light can have a lot of energy and is able to break chemical bonds. For example some things fade or lose their color when left in sunlight. When light breaks the chemical bonds, free radicals are produced. A free radical is a molecule, atom or an ion that needs an electron. The free radical will take electrons from other molecules or atoms and this starts chemical reactions.
+ Photography, Film
  * The picture the lens makes is recorded on photographic film. Film is placed inside the camera box. Light coming through the lens, aperture and open shutter shines on the film. Photographic film is coated with chemicals that react when light shines on it. Letting light shine on the film is called 'exposing' the film.
+ Pupil (eye): Eye anatomy
  * The 'pupil' is the black opening in the centre of the eye. Light enters through the pupil and goes through the lens, which focuses the image on the retina. The size of the pupil is controlled by muscles. When more light is needed, the pupil is made larger. In brighter light, the pupil is made smaller. The pupil can be compared with the shutter of a camera. It is surrounded by the iris which is the colour part of the eye.
+ Quantum mechanics: Basic physics ideas :: Mechanics :: Mathematics :: Nuclear physics :: Quantum mechanics
  * Photons are particles, much smaller than atoms. The more photons a lamp shoots off, the brighter the light. Light is a form of energy that behaves like the waves in water or radio waves. Each photon carries a certain amount, or 'quantum', of energy depending on its wavelength.
+ Sensation, Visual sense: Psychology :: Physiology
  * Light enters the eyes through the cornea. It then passes through the pupil, and is refracted by the crystalline lens of the eyes. Light is then channeled through the vitreous humour and then on to the retina. In the retina, there are two kinds of cells, rods and cones. Cones then, see colored structures. Cones are exceptionally abundant in the fovea.
+ Time travel, The speed of light: Fiction :: Physics
  * Light moves very fast, faster than anything else in the universe. Light can go around the earth three times in one second. Most cars can only travel about 100 miles in one hour. Most people can only run 12 miles in one hour.
  * International Commission on Illumination 1987. CIE, 4th edition. Any radiation capable of causing a visual sensation directly. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. Animals can also see light. Light exists in tiny packets called photons. It shows properties of both waves and particles. The study of light, known as optics, is an important research area in modern physics.
  * Light is electromagnetic radiation that is in the form of a wave. Each wave has a wavelength or frequency. The human eye sees each frequency as a different color. Rainbows show the entire spectrum of visible light. The separate colors, moving in from the outer edges, are usually listed as red, orange, yellow, green, blue, and violet.