Question

A ray of light enters into benzene from air. If the refractive index of benzene is 1.50, by what percent does the speed  of light reduce on entering the benzene?

Answer 1

The Required Answer is 33%

Answer 2

Given:

Refractive index = 1.50

Light enters benzene.

To find:

The reduction in the speed of the light.

Solution:

By formula,

Refractive index = c / v

Where,

c - speed of light in air

c = 3 * 10^8 m / s

v -  speed of light in benzene.

v = c / Refractive index

Substituting,

We get,

v = 3 * 10^8 / 1.50

Hence, the speed of the light in benzene = 2 * 10^8 m / s

Difference in speeds =  3 * 10^8 - 2 * 10^8 / 3 * 10^8

Hence, the speed reduces by 33%  

Read more on Brainly.in - https://brainly.in/question/6683523