Question

A layer of benzene floats on water. If the angle of incidence of the light entering the benzene from air is 60oC, what is the angle the light makes with the vertical in the water? (Given nbenzene = 1.50, nair = 1.00 and nwater = 1.33)

Answer 1

Explanation:

When the light enters from rarer medium to denser medium, its speed reduces. The ratio of the speed of light in the two media gives the refractive index of the medium.

Refractive index,

 (given for Benzene)

speed of light in air,

Hence, speed of light in the medium,

The percentage of speed of light reduces

Hence, the speed of light reduces by 33.3 % on entering Benzene.