| Term | Definition |
|---|
| Electromagnetic wave | a disturbance that transfers energy through a field |
| Radiation | energy that moves in the from of EM waves |
| Electromagnetic spectrum | the range of all EM frequencies |
| Radio waves | EM waves that have the longes wavelengths, lowest frequencies, lowest energies |
| Microwaves | EM waves with shorter wavelenghths, higher frequencies and higher energy than radio waves |
| Visible light | part of the EM spectrum that human eyes can see |
| Infrared light | part of the spectrum consistes of EM frequencies between microwave and visible light |
| Ultraviolet light | part of the EM spectrum consists of frequencies above those of visible light and below x-rays |
| X-rays | have frequencies from about 10 to the 16th Hz to 10 to the 21 hz |
| Gamma rays | have frequencies from about 10 to the 19th hz to 10 to the 24 hz |
| Incandesence | the production of light by materials at high temperatures |
| Luminescence | the production of light without the high temperatures needed for incandescence |
| Bioluminescence | the production of light by living organisms |
| Fluorescence | occurs when a material absorbs EM radiation of one wave lenght, gives off EM radiation of another |
| Transmission | the passage of an EM wave through a medium |
| Absorption | the dissapperance of an EM wave through a medium |
| Scattering | speading out of light rays in all direction, but particles reflect and absorb the light |
| Polarization | a quality of light in which all of its waves vibrate in the same direction |
| Prism | a tool that uses refraction to spead out the wavelenths that make up white light |
| Primary colors | these threecolors of light which cna be mixed to produce all possible colors |
| Primary pigments | are cyan, yellow, and magenta |
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