### energy | radiation:

Electromagnetic wave
* All electromagnetic waves are identical except for differences in their
  - originate from accelerating charged particles
  - propagate at the speed of light
* All electromagnetic waves travel at the same speed the speed of light
  - same velocity in vacuum, the speed of light
  - speed of light and have no mass
* Most electromagnetic waves become thermal waves
  - release energy
* Some electromagnetic waves have energy
  - higher energies than others
  - transfer heat
* are a form of energy
  - major means of moving energy around the universe
  - also transverse
  - little force fields that stay around to charge particles
  - subject to interference
  - the same as radio waves
  - transverse waves
  - transverse, while sound waves are longitudinal
* can travel through empty space.
* carry both energy and momentum, which can be delivered to a surface
  - energy through space and time
* consist of varying electric and magnetic fields.
* course through the universe.
* cover a wide range of radiations, starting from radio waves to gamma rays.
* depend on mutual field regeneration.
* entering Earth's atmosphere from space are bent by refraction.
* have both electric and magnetic components
  - different wavelengths
  - more power than light waves, so they penetrate the skin
* involve oscillating electric and magnetic fields.
* is radiation
* occur in the ionosphere and magnetosphere as well as the Earth's outer core.
* result when a charged object is accelerated or decelerated.
* transport energy through space.
* travel very fast.
* vary in frequency, or the amount of energy they contain.

Electron beam
* Most electron beams have energy.
* can sterilize food-product containers.

Excessive radiation
* can cause cancer.
* causes skin cancer, cataract and loss of immunity in human beings.
* harms fauna and flora, especially marine microorganisms.
* is present in the form of uranium oxide from impoverished uranium.

External radiation
* is delivered by a machine outside the body
  - given in divided doses to the pelvis five days a week for five weeks
  - radiation originating from a source external to the body
  - the use of a machine to aim high- energy rays at the cancer
  - typically the method used for cancer of the adrenal cortex
* safe and basically painless form of treatment.

### energy | radiation:

Infrared radiation
* can cause damage to the inner materials of the eye
  - penetrate into a polymer and create a zone of melt quickly
* comes from the dust disk.
* form of light, invisible to human eye
* has enough energy to affect molecular motions of substances
  - higher frequencies and higher energies than ultraviolet radiation
  - too little energy to be useful in photosynthesis
* is absorbed by greenhouse gases in the atmosphere
  - molecules on the Earth
  - water vapor and carbon dioxide in the lower atmosphere
  - an example of radiant energy
  - associated with heat energy
  - converted into a real-time, visible light image
* is electromagnetic radiation with a wavelength beyond visible light
  - emitted by the c -rth's surface
  - energetic enough to affect molecular activity
  - experienced as heat
  - heat radiation
  - invisible for the human eye
  - mainly heat
* is part of a broad electromagnetic spectrum
  - electromagnetic spectrum which permeates our physical world
  - passed through a sample gas that imparts a spectral pattern to the radiation
  - slightly less powerful than red light
  - synonymous with heat
* is the most efficient way in drying the laminate
  - primary mode of heat transfer in boilers and large furnaces
  - thermal, or heat , radiation
* lies between the visible and microwave portions of the electromagnetic spectrum.
* represents just under half of the sun's energy that reaches the earth's surface.

Initial radiation
* contains both gamma and neutron radiation.
* is most deadly within about two miles of ground zero.