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Question
A: It is necessary for transmitting antenna to be at same height as that of receiving antenna for line of sight communication.
B: EM waves of frequency beyond 40MHz, propagate as space waves.
A: It is necessary for transmitting antenna to be at same height as that of receiving antenna for line of sight communication.
B: EM waves of frequency beyond 40MHz, propagate as space waves.
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Solution
The correct option is D only B is correct
Transmitter can be placed at any height as long as the receiver is in range because it just has to transmit the signal, height from which it is transmitted is of no importance. Frequencies more than 40 MHz cannot be reflected by the ionosphere. Thus, they are propagated as space waves.
Transmitter can be placed at any height as long as the receiver is in range because it just has to transmit the signal, height from which it is transmitted is of no importance. Frequencies more than 40 MHz cannot be reflected by the ionosphere. Thus, they are propagated as space waves.
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