Question

What is speed of radio waves in free space?

(a) 3 x 10^6 m/s

(b) 3 x 10^9 m/s

(c) 300 x 10^6 m/s

(d) 300 x 10^9 m/s

This question was posed to me by my school principal while I was bunking the class.

I want to ask this question from Frequency Translation topic in section Modulation of Analog Communications

Answer 1

Correct choice is (c) 300 x 10^6 m/s

Explanation: he speed of radio waves in free space is same as the speed of light which is 3 x 10^8 m/s. It cal also be written as 300 x 10^6.