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Why is ground wave transmission of signa...

Why is ground wave transmission of signals restricted to a frequency of 1500 kHz ?

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In ground wave transmission of signals restricted to a frequency of 1500 kHz as in ground wave propagation, the energy of the signal is absorbed by the earth. The loss of energy increases with the increase in the frequency of the signal. If frequency is more than 1500 kHz signals are damped by interaction with matter.
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