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)×10^6The 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

In stratosphere, the excess refractive index is given as ________ in t

1.	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)×10^6The 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» 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.

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