Question

The velocity of wave in the air medium is

(a) 1 x 10^8

(b) 1.5 x 10^8

(c) 3 x 10^8

(d) 1 x 10^9

I had been asked this question during a job interview.

Question is from Transmission Line Secondary Parameters in division Transmission Lines of Electromagnetic Theory

Answer 1

The correct answer is (c) 3 x 10^8

To elaborate: The light is travelling at its fastest speed in air medium. Thus the velocity of a wave in the air medium is assumed to have the speed of light. It is given by c = 3 x 10^8.