Wave used for telecommunications
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Question reference is not valid, it should be waves instead of wave.
As telecommunication comprises wide range of waves from electromagnetic spectrum for the disparate operation.
Waves used are:
Radio waves, Microwaves, Sound waves, Infrared waves and Visible light.
Radio waves – For television and radio programs.
Microwaves – Satellite television and mobile phones.
Sound waves- They can be reflected by surfaces, these reflections are called echoes.
Infrared waves – To transmit information from remote controls.
Visible light – In photography.
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