| A | B |
|---|
| amplitude modulation (AM) | method of transmitting radio signals by changing the AMPLITUDE of the waves |
| bioluminescence | the production of light by a living organism |
| electromagnetic radiation | energy that travels through space in the form of electromagnetic waves |
| electromagnetic spectrum | the range of electromagnetic waves placed in a certain order |
| electromagnetic wave | transverse waves that transfer electric and magnetic energy; can travel through space |
| fluorescent light | lights that glow when an electric current causes ultraviolet waves to strike a coating inside a tube |
| frequency modulation (FM) | method of transmitting radio signals by changing the FREQUENCY of the waves |
| gamma ray | electromagnetic waves with the shortest wavelengths and highest frequencies |
| illuminated | word used to describe an object that can be seen because it reflects light |
| incandescent light | lights that glow when a filament inside them gets hot |
| infrared ray | electromagnetic waves with HIGHER frequencies and SHORTER wavelengths than radio waves |
| luminous | word used to describe an object that can be seen because it emits light |
| magnetic resonance imaging (MRI) | a process that uses radio waves to form PICTURES/images of the inside of the human body |
| microwave | radio waves with the SHORTEST WAVELENGTHS and Highest Frequencies |
| neon light | glass tubes filled with neon that produce light |
| photoelectric effect | the movement of electrons in a substance when light is shined on it |
| photon | a tiny particle or packet of light energy |
| polarized light | light that vibrates in only one direction |
| radar | a system of detecting reflected radio waves |
| radio wave | electromagnetic waves with the longest wavelengths and lowest frequencies |
| sodium vapor light | bulbs containing solid sodium plus neon and argon gas that produce light |
| spectroscope | an instrument used to view the different colors of light produced by different sources |
| thermogram | an image that shows regions of different temperatures in different colors |
| tungsten-halogen light | bulbs containing a tugsten filament and a halogen gas that produce light |
| ultraviolet ray | electromagnetic waves with frequencies higher than visible light, but lower than X-rays |
| visible light | electromagnetic radiation that can be seen with the unaided eye |
| X-ray | electromagnetic waves with HIGHER frequencies than ultraviolet rays, but shorter than gamma rays |
