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Question

Which one of the following does TV remote control unit use to operate a TV set?

A
Light waves
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B
Sound waves
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C
Microwaves
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D
Radiowaves
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Solution

The correct option is

D

Radiowaves

Radio waves are a type of electromagnetic radiation with wavelengths longer than infrared light in the electromagnetic spectrum. They travel at the speed of light, just like all other electromagnetic waves. Artificially generated radio waves are used in fixed and mobile radio communication, broadcasting, radar and navigation systems, satellite communication, computer networks, and a variety of other applications.


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