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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

Posted by S.K Gamer 6 years, 9 months ago

CBSE > Class 10 > Science

1 answers

Gaurav Seth 6 years, 9 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)

1Thank You

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