### energy | radiation | light:

Laser light
* are dangerous and can cause serious injury, especially to the eyes.
* can be coherent light.
* can cause eye damage
  - severe eye damage
  - selectively penetrate tissue and activate glue inside an incision
* carries sound or other data through the optical fibers in fiber optic cables.
* contains a lot of energy.
* convenient way of transporting both electric and magnetic fields.
* has a single wavelength that is focused in a narrow beam.
* has an advantage when it comes to focusing atoms on the nanometer scale
  - important property known as coherence
* has several properties that make it different from regular light
  - that, together, make lasers useful
* is a. chaotic
  - acheived by using laser diods and allow better penetration of the laser light
  - collimated because all of the rays are parallel to each other
  - compared and contrasted with ordinary white light
  - contained in an optical fiber because of internal reflection
  - converted into heat when it is absorbed by melanin
* is directed and controlled precisely and delivered in brief, intense pulses
  - into a vial or flow cell containing media from the suspension
  - directional, meaning that all the light emitted is going in one direction only
  - effectively monochromatic
  - focused onto the back of a cantilever that ends with a nanometre-scale tip
  - high powered, directional, coherent, and has a double wavelength
  - highly directional, in a tight beam
  - made up of only one color of light concentrated into a narrow band of frequencies
  - monochromatic, that is, the light is of single color or wavelength
  - of a single wavelength - all the energy works together and in one direction
  - produced by passing electrical energy through a lasing medium
  - projected along the sides of a triangle
* is quite different for a few reasons
  - in that all the light is directed the same way
  - reflected differently from burned tissue than from normal tissue
  - static, like the light emitted from a standard bulb
* is the most advanced technology of recent times
  - standard example of a monospectral light
  - used for pattern visualization
* is used to close veins and reattach the retina to the eye wall
  - determine food textures and quality
  - within the normal visible, or near visible, light spectrum
* passes through extremely thin hollow tubes without losing intensity or changing color
  - the skin until it hits the tattoo pigment, which it then breaks up
* reflects off window glass, carrying with it vibrations from noise inside the room.
* shows feature laser beams that are bounced off mirrors
  - seasonally
  - that encroach on airports have a serious impact on safety
* special kind of beam of light.
* stays coherent over vast distances, the beams spreading very little.
* travels as a parallel beam and spreads very little
  - in synchronized, matching waves of a single precise color
  - through a fiberoptic tube much like water running through a hose

Less light
* goes in when the pupil is closed more and looks smaller.
* means less energy
  - visibility
  - the color looks darker
* reaches the latitudes above the equator.

Light beam
* Some light beams are used by detectors.
* follow every surface, just as in real life.
* is light
* produced by an incandescent bulb, a laser, and an atom are different.

Light microscopy
* demonstrates glycosaminoglycan deposits within stromal keratocytes.
* includes bright field, dark field, phase contrast, and epifluorescence.
* is used to decode data notches on extracted fish wire tags into a binary number
  - examine a range of micro-organisms
* reveals bulla formation within upper dermis
  - large glycogen-containing vacuoles in nearly all muscle fibers