Question

Assertion: It is not necessary for a transmitting antenna to be at the same height as that of receiving antenna for line-of sight communication.
Reason: If the signal is to be received beyond the horizon then the receiving antenna must be high enough to intercept the line-of sight waves.

• A. A and R are true and R is the correct explanation of A.
• B. A and R are true but R is not correct explanation of A.
• C. A is true but R is false.
• D. A is false but R is true.

Answer 1

Answer: (A)

A and R are true and R is the correct explanation of A.

The line of sight communication is basically the space wave communication. The maximum range of space wave communication is given as $d=1.23[\sqrt{H_t}+\sqrt{H_r}]$ (Here, $H_t$ and $H_r$ are the heights of the transmitting and the receiving antenna). They just need to be high enough to intercept the line-of sight waves.