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Arey light enters into benzene from …

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Arey 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
  • 1 answers

Gaurav Seth 5 years, 2 months ago

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% (approx)

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