Question

The reflection coefficient of a wave travelling through two media having magnetic intrinsic impedances of 2 and 1 respectively is

(a) ^1⁄2

(b) ^1⁄3

(c) ^1⁄4

(d) ^1⁄5

This question was addressed to me in a national level competition.

My enquiry is from Intrinsic Impedance and Propagation Constant in division Transmission Lines of Electromagnetic Theory

Answer 1

The correct choice is (b) ^1⁄3

Explanation: The reflection coefficient in terms for magnetic intrinsic impedance is R = η1 – η2/η1 + η2. On substituting the given data, we get R = 2 – 1/2 + 1 = 1/3.