EM Waves and Communication

EM Waves and Communication

1. EM Radiation transmits information

   • Infrared > tv remotes
   • microwaves > mobile phones
   • Radio > TV & radio transmissions and radar

2. Radio Waves are used mainly for communications on Earth

   • good at transmitting information over longer distances as they dont get absorbed by the atmosphere as much as others
   • Radiowaves used for radio have short wavelengths

3. Microwaves are used for satellite communication

   • Microwaves pass freely through the atmosphere
   • Satellite dishes work like this

4. Infrared and light used in optical fibres