Question

Find the ratio of the refractive index of medium 1 to that of medium 2, when the incident and reflected angles are given by 300 and 450 respectively.

(a) 0.5

(b) 1

(c) 2

(d) 4

The question was asked in my homework.

Question is taken from Snell Law and Critical Angle topic in chapter EM Wave Propagation of Electromagnetic Theory

Answer 1

Right choice is (c) 2

To elaborate: The Snell law is given by N1 sin θi = N2 sin θt. For getting N1/N2, the ratio is sin θt/sin θi. On substituting for θi = 30 and θt = 45, we get sin 45/sin 30 = 2.