Question

Identify a suitable frequency for skywave propagation.

(a) Upto 2 MHz

(b) From 2 MHz to 30 MHz

(c) From 2 MHz to 50 MHz

(d) From 2 MHz to 80 MHz

The question was posed to me during an online interview.

My doubt stems from Communication Systems topic in portion Communication Systems of Physics – Class 12

Answer 1

Correct answer is (b) From 2 MHz to 30 MHz

For explanation I would say: Skywave propagation is useful for radiowaves of frequency from 2 MHz to 30 MHz. Frequencies that are higher than 30 MHz cannot be reflected by the ionosphere.