Question

Expression for refractivity is given by ___________

(a) N=(n-1)×10^6

(b) N=(n-1)×10^-6

(c) N=1/(n-1)

(d) N=\(\frac{1}{n-1}\)×10^-6

The question was posed to me by my college professor while I was bunking the class.

This question is from Space Wave Propagation in division Space Wave Propagation of Antennas

Answer 1

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

For explanation: Refractivity is to observe the change in refractive index due to the smallest change in the relative dielectric constant.

N=(n-1)×10^6