A ray of light is incident on the mid-point of a glass prism surface at an angle of 20 $\degree$with the normal.For the glass,n = 1.60,and the prism apex angle is 35 $\degree$.What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?
A)38.0 $\degree$
B)35.1 $\degree$
C)22.7 $\degree$
D)12.3 $\degree$

Question

Quizplus · Accepted Answer

Using Snell's law and the geometry of the prism, the angle of refraction inside the prism can be calculated, and then the angle of incidence at the glass-to-air surface can be determined.

A Ray of Light Is Incident on the Mid-Point of a Glass