Question

what is the principal of radio​

Answer 1

Answer:

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Explanation:

Radio systems are designed to transport only these audible tones. Since signals from the audio range have such a low frequency that they will not radiate from an antenna, a high frequency radio signal has to be used as a "carrier" signal to transport the information through the air.

Answer 2

Answer:

Here is your answer.

Explanation:

technology, transmission and detection of communication signals consisting of electromagnetic waves that travel through the air in a straight line or by reflection from the ionosphere or from a communications satellite.

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