What is the angle of incidence on an air-to-glass boundary if the angle of refraction in the glass (n = 1.52)is 28.0°?
A)18.0°
B)28.0°
C)42.6°
D)45.5°
E)18.4°

Question

Quizplus · Accepted Answer

Using Snell's Law, n1*sin(theta1) = n2*sin(theta2). For air, n1 = 1, and for glass, n2 = 1.52. Given theta2 = 28.0°, solve for theta1: sin(theta1) = 1.52*sin(28.0°). Calculating gives theta1 ≈ 45.5°.

What Is the Angle of Incidence on an Air-To-Glass Boundary