Question

In stratosphere, the excess refractive index is given as ________ in terms of refractive index μ.

(a) N=(μ-1)×10^-6

(b) N=(μ-1)×10^6

(c) N=(1+μ)×10^-6

(d) N=(μ+1)×10^6

The question was asked by my school teacher while I was bunking the class.

This question is from Radio Wave Propagation topic in section Radio Wave Propagation of Antennas

Answer 1

The correct option is (a) N=(μ-1)×10^-6

The best I can explain: The excess refractive index over unity in millionths is given by N=(μ-1)×10^-6

Where refractive index μ=0.0003% greater than unity for troposphere.