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Communication - 


Radio Waves

Micro Waves

Visible Waves


Ultra Violet


Gamma Rays

  • Communication is the exchange of information
  • We use Non-Ionizing radiation for communication because it can penetrate through solids, liquids and gasses.

What devices uses what Radiation:

I only know 2 and they are:

T.V remotes and Mobile phones uses Infered radiation 

Radios use Radio Waves.

Quick Question:

What sort of radiation do sun beds use and why are they bad? (1mark)


  • Information is sent form place to place using carrier waves
  • Radio Waves, Microwaves, Infared or Visible Light can form teh carrier wave
  • A wave carrying information is called a signal 

Analogue and Digital signals:

Can take only…


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