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(i) Which mode of propagation is used by short wave broadcast service having frequency range from a few MHz upto 30 MHz ? Explain diagrammatically,upto what distance, communication can be achieved, by this mode. (ii) Why is there an upper limit to the frequency of waves used in this mode ? |
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Answer» (i) Which mode of propagation is used by short wave broadcast service having frequency range from a few MHz upto 30 MHz ? Explain diagrammatically,upto what distance, communication can be achieved, by this mode. (ii) Why is there an upper limit to the frequency of waves used in this mode ? |
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