| A | B |
|---|
| 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 electric charges, can travel through a vacuum or through matter, and have a wide variety of frequencies and wavelengths |
| Gamma rays | Electromagnetic wave with no mass and no charge that travels at the speed of light and is usually emitted with alpha or beta particles from a decaying atomic nucleus, Greatest frequency electromagnetic wave |
| Global Positioning System | A system of satellites and ground monitoring stations that enable a receiver to determine its location at or above Earth's surface |
| Infrared waves | Electromagnetic waves that have a wavelength between about 1 mm and 750 billionths of a meter, has wavelengths just longer than visible light |
| Microwaves | Radio waves with wavelengths of between about 1 m and 1 mm, just shorter wavelengths than typical Radio Waves |
| Photon | Particle that electromagnetic waves sometimes behave like; has energy that increases as the frequency of the electromagnetic wave increases |
| Radiant energy | Energy carried by an electromagnetic wave |
| Radio waves | Electromagnetic waves with wavelengths longer than about 1mm, longest wavelength electromagnetic wave |
| Transceiver | Device that transmits one radio signal and receives another radio signal at the same time, allowing a cordless phone user to talk and listen at the same time |
| Ultraviolet waves | Electromagnetic waves lengths between about 400 billionths and 10 billionths of a meter, next shortest wavelength to visible light |
| Visible light | Electromagnetic waves with wavelengths of 750 to 400 billionths of a meter that can be detected by human eyes |
| X rays | Electromagnetic waves with wavelengths between about 10 billionths of a meter and 10 trillionths of a meter, that are often used for medical imaging of bones |
