Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?
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This question was previously asked in
Shift 05/06/2023 3:30 PM - 6:30 PM
A
10 KHz
B
10 MHz
C
1 GHz
D
1000 GHz
Correct Answer
10 MHz
Detailed Explanation
For beyond-the-horizon communication, it is necessary for the signal to cover large distance. 10 KHz signals cannot be radiated efficiently because of the antenna size. The high energy signal waves (1 GHz − 1000 GHz) penetrate the ionosphere and escape. 10 MHz frequencies get reflected easily from the ionosphere. Hence, signal waves of 10MHz frequencies are suitable for beyond-the-horizon communication.
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