Question

A ground receiver receives a signal at $5MHz$ transmitted by a ground transmitter at a height of $320m$, which is $110km$ away from it. Then it can communicate through
(radius of the Earth, $R=6400km$).

• A. space waves
• B. ground waves
• C. sky waves
• D. both sky and ground waves
• E. sky waves, ground waves and space waves

Answer 1

The correct option is D both sky and ground waves

The range of frequency for ground waves is from a few KHz to few MHz (5 MHz) and that for the for sky wave propagation is from 3 MHz to 32 MHz.

Since the frequency of received signal is $5MHz$. which lies between the range of sky wave communication as well as ground wave communication.