Three materials with n₁

Question

Three materials with n₁< n₂< n₃ are arranged in layers of uniform thickness. A light ray in air enters the first layer at an angle of incidence of 40° and the ray eventually exits the third layer at the refracted angle $\theta$ in air. What is the value of $\theta$? A) Some angle more than 40°. B) Insufficient information to answer. C) 40°. D) Some angle less than 40°.

Quizplus · Accepted Answer

According to Snell's Law, if the ray exits into the same medium it entered from, the angle of incidence equals the angle of refraction, so the exit angle is 40°.

Three Materials with N1 < N2 < N3 Are Arranged θ\thetaθ

Three Materials with N₁< N₂< N₃ Are Arranged $\theta$