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Why are short waves used in long distanc...

Why are short waves used in long distance broadcasts?

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The short waves (wavelength less than 200 m or frequencies greater than 1,00 kHz) are absorbed by the earth due to their high frequency but are effectively reflected by Flayer in ionosphere. After reflection from the ionosphere, the short waves reach the surface of earth back only at a large distance from the trasnsmitter. For thid reason, short waves are used in long distance transmission.
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