Arey light enters into benzene from …
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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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