Question

Light is reflected from a glass coffee table. When the angle of incidence is 60.2⁰, the reflected light is completely polarized parallel to the surface of the glass. What is the index of refraction of the glass?

Answer 1

The words "completely polarized parallel to the surface of the glass" mean that the total internal reflection occurred:

$$\sin\theta_c=1/n,\\\space\\n=1/\sin\theta_c=1/\sin62°=1.13.$$