Communications

• Shorter the Wavelength -> Higher Frequencies ->More info -> Less Range
• Longer the Wavelength -> Lower Frequencies ->Less info -> More Range
• What are Microwaves used for in communications?

  Satellite networks and mobile phone networks
• What are Radio Waves ≥1m used for in communications?

  Tv broadcasting
• What are Radio Waves 1m-100m used for in communications

  Local radio stations and Emergency Services
• What are Radio Waves 100m≤ used for in communications?

  National Radio
• What are Carrier Waves? State some examples.


  Any type of waves that can carry any signal/information e.g: Infrared, Visible Light and Radio Waves
• What are Optical Fibres?

  Thin strands of glass or plastic that transmit communication signals through light and Infrared over long distances.