A ray of light is incident on the mid-point of a glass prism surface at an angle of 23.7° with the normal.For the glass,n = 1.60,and the prism apex angle is 36.1°.What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?
A) 40.0°
B) 14.5°
C) 21.6°
D) 12.4°
E) 26.8°

Question

A ray of light is incident on the mid-point of a glass prism surface at an angle of 23.7° with the normal.For the glass,n = 1.60,and the prism apex angle is 36.1°.What is the angle of incidence at the glass-to-air surface on the side opposite where the ray exits the prism?
A) 40.0°
B) 14.5°
C) 21.6°
D) 12.4°
E) ​26.8°

Quizplus · Accepted Answer

Using Snell's Law and the geometry of the prism, the angle of incidence at the glass-to-air surface is calculated to be 21.6°.

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