Question

Refractive index is directly proportion to ___________

(a) \(\sqrt{ϵ_r}\)

(b) \(1/\sqrt{ϵ_r} \)

(c) ϵr

(d) 1/ϵr

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

I want to ask this question from Space Wave Propagation in division Space Wave Propagation of Antennas

Answer 1

Correct answer is (a) \(\sqrt{ϵ_r}\)

Best explanation: Refractive index is ratio of velocity of light in air to velocity of light in medium

n=c/v

\(n=\sqrt{ϵ_r μ} \)