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An initially parallel cylindrical beam t...

An initially parallel cylindrical beam travels in a medium of refractive index `mu(I)=mu_0+mu_2I`, where `mu_0` and `mu_2` are positive constants and I is the intensity of the light beam. The intensity of the beam is decreasing with increasing radius.
32. The speed of light in the medium is

A

the same everywhere in the beam.

B

directly proportional to the intensity `I`.

C

maximum on the axis of the beam

D

minimum on the axis of the beam

Text Solution

Verified by Experts

The correct Answer is:
D
The speed of light in the medium is minimum on the axis of the beam, because refractive index of medium is maximum at the axis of beam.
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