Communications

Communications

1. Radio waves are emitted from an aerial when we apply a voltage to the aerial

2. The shorter the wavelength of the waves, the more information they can carry, the shorter the range and the less they are spread out

3. Micro waves are used for satellite phone and TV links.

4. Radio waves are used for TV broadcasting

5. Radio waves are used for radio stations

6. Optical fibres are carried by light or infrared radiation, optic fibres carry more info than radio and micro eaves and they are more secure.