Author Question: A ray of light in glass strikes a water-glass interface at an angle of incidence equal to one-half ... (Read 157 times)

iveyjurea · **on:** Jul 29, 2018

A ray of light in glass strikes a water-glass interface at an angle of incidence equal to one-half the critical angle for that interface.

The index of refraction for water is 1.33, and for the glass it is 1.43. What angle does the refracted ray in the water make with the normal?
A) 37
B) 42
C) 47
D) 32
E) 27

Question 2

A light ray enters a glass enclosed fish tank. From air it enters the glass at 20 with respect to the plane of the surface and then emerges into the water.

The index for the glass is 1.50 and for water 1.33.
(a) What is the angle of refraction in the glass?
(b) What is the angle of refraction in the water?
(c) Is there any incident angle in air for which the ray will not enter the water due to total internal reflection? If so, find it.