| A | B |
|---|
| GPS | tells you your exat location on Earth |
| microwaves | used by cell phones to send and receive signals |
| thermograms | images mabe by an infrared camera to identify warm and cool parts |
| medium | substance through which a wavce moves; electromagnetic waves can transfer energy without a medium |
| Communications satellites | orbit Earth to receive and send radio, telephone, adn telvision signals |
| Particle model | explains the photoelectric effect |
| Speed | does not change for electromagnetic waves in a vacuum |
| x-rays | used to make images of bones and teeth |
| electromagnetic waves | have some electrical properties and some magnetic properties |
| FM signals | travel as changes in the frequency of the wave |
| polarized light | light that has passed through a polarizing filter |
| gamma ray | electromagnetic waves with the highest frequencies |
| Photoelectric effect | electric current will flow when light shines on certain substances |
| spectrum | visible light separated into colors |
| radiowaves | longest wavelengths and lowest frequencies |
| infrared rays | lower frequency than visible light |
| AM waves | the frequency remains constant |
