Physical Science chapter 12
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14 terms
Terms | Definitions |
|---|---|
 carrier wave | Specific frequency that a radio station is assigned and uses to broadcast signals. |
| cathode-ray tube | sealed vacuum tube that produces one or more beams of electrons that produce an image when they strike the coating on the inside of a TV screen |
| electromagnetic wave | Waves created by vibrating electrical charges; travels through vacuum and matter. Has a wide variety of frequencies and wavelengths. |
| gamma rays | Electromagnetic waves with the highest frequencies and the shortest wavelengths in the electromagnetic spectrum |
| Global Positioning System | A system of satellites, ground monitoring stations, and receivers that determine a person's or object's exact location at or above the Earth. |
| infrared waves | type of electromagnetic wave with wavelengths between about 1 mm and about 750 billionths of a meter, can be felt as heat |
| microwaves | shorter than radio waves - used for cooking and communication |
| photon | particles that electromagnetic waves behave like; has energy that increases as the frequency of the electromagnetic wave increases |
| radiant energy | the energy transmitted by electromagnetic waves |
| radio waves | electromagnetic waves with the longest wavelengths and lowest frequencies, used for communication |
| transceiver | A device that can transmit and receive, such as transmitting and receiving signals on a communication cable |
| ultraviolet waves | have frequencies slightly higher than visible light; can damage skin |
| visible light | That portion of the electromagnetic spectrum detected as various colors by the human eye, ranging in wavelength from about 380 nm to about 750 nm. |
| X rays | Have and even higher frequency than ultraviolet rays and have enough enery to go right through skin and muscle |
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