What are carrier waves? Why do we need the carrier waves of high frequency for distant communication?

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Solution

A carrier wave is a electron magnetic wave of light frequency and of constant amplitude, which is employed to carry audio signals from one location to other one the surface of earth.
For the transmission of audio signals at distant places, the high frequency carrier waves are used, because these frequency carrier waves travel through space or medium with the speed of light and they are not obstructed by earth's atmosphere.

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