A light ray in air is incident on an air-to-glass boundary at an angle of 30.0° and is refracted in the glass at an angle of 16.7° with the normal.Find the index of refraction of the glass.
A) 1.74
B) 1.40
C) 1.23
D) 2.13

Question

Quizplus · Accepted Answer

Using Snell's law, we have:

n_air * sin(30.0°) = n_glass * sin(16.7°)

We know that n_air = 1 (since it's air)

Therefore:

n_glass = sin(30.0°)/sin(16.7°)

n_glass = 1.74

Therefore, the index of refraction of the glass is 1.74. The correct choice is A.

A Light Ray in Air Is Incident on an Air-To-Glass