| A | B |
|---|
| electomagnetic waves | Thansvers waves that transfer electric and magnetic energy |
| electromagnetic radiation | Energy that travels through space in the form of electromagnetic waves |
| polarized light | Light that vibrates in only one direction |
| photoelectric effect | The movement of an electron in a substance when light is shined on it |
| photon | tiny particle or packet of light energy |
| electromagnetic spectrum | The range of electromagnetic waves placed in a vertain order. |
| radio wave | Electromagnetic waves witht he longest wavelengths and lowest frequencies. |
| microwave | Radio waves with the shortest wavelengths and the highest frequencies |
| radar | A system of detecting reflected radio waves. |
| magentic resconance imaging | A process that uses radio waves to form pictures of the inside of the human body |
| infared ray | Electromagnetic Waves with higher frequencies and shorter wavelengths that radio waves. |
| thermogram | An image that shows regions of different tempatures in different colors. |
| visible light | Electromagnetic radiation that can be seen with the unaided eye |
| ultraviolet ray | Electromagnetic waves with frequencies higher that visible light, but lower than x-rays. |
| X-ray | Electromagnetic waves with higher frequencies than ultraviolet rays, but shorter thatn gamma rays. |
| gamma ray | Electromagnetic waves with the shortest wavelenghts and highest frequencies. |
| illuminated | Word used to describe an object that can be seen because it reflects light |
| luminous | Word used ti describe an object that cna be seen because it emits light. |
| spectroscope | An instrument used to view that differnet colors of light produced by differnet sources. |
| incandescent light | Lights that glow when a filamentinside them gets hot, |
| fluorescent light | Lights that glows when an electric current causes ultraviolet to strike a coating inside the tube. |
| neon light | Glass tubes filled with neon that produces light |
| sodium vapor light | Light bulbs containing solid sodium plus neon and argon gas |
| tungsten-halogen light | Bulbs containing a tungsten filament and a holgen gas that produce light |
| bioluminescence | Light produced by organisms as a result of a chemical reaction |
| amplitude modulation (AM) | Methods of transmitting radio signals by changing the amplitude of the waves. |
| frequency modulation (FM) | Method of transmitting radio signals by changing frequency of the waves. |
