Three waves A,B and C of frequencies 1600 kHz, 5 MHz and 60 MHz, respectively are to be transmitted from one place to another.Which of the following is the appropriate mode of communication?

Options

A. `A` is transmitted via space wave while `B and C` are transmitted via sky wave
B. `A` is transmitted via ground wave , `B` via sky wave and `C` via space wave
C. `B and C` are transmitted via ground wave while `A` is transmitted via sky wave
D. `B` is transmitted via ground wave while `A and C` are transmitted via space wave

Answer

B

Explanation

For ground wave propagation , the frequency range is `530 kHz "to" 1710 kHz`. For sky wave propagation , the frequency range is `3 MHz "to" 30 MHz` . For space wave propagation , the frequency range is `54 MHz "to" 4.2 GHz`. Thus ooption (b) is correct .