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Find the reflection coefficient of a wave with an incident electric field of 5 units and reflected electric field of 2 units.(a) 2.5(b) 0.4(c) 0.8(d) 1.2This question was posed to me in unit test.My question is based upon S and P Polarised Waves in section EM Wave Propagation of Electromagnetic Theory

Answer»

Correct ANSWER is (b) 0.4

Easy EXPLANATION: The reflection COEFFICIENT is the ratio of the reflected electric FIELD to the incident electric field. Thus τ = Er/Ei. On substituting for Ei = 5 and Er = 2, we get τ = 2/5 = 0.4(no unit).



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