1.

The sky wave propagation is suitable for radio- waves of frequency

A. upto \[2\,MHz\]
B. from \[2\,MHz\] to \[20\,MHz\]
C. from \[2\,MHz\] to \[30\,MHz\]
D. from \[2\,MHz\] to \[50\,MHz\]
Answer» D. from \[2\,MHz\] to \[50\,MHz\]


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