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An intially parallel cyclindrical beam t...

An intially parallel cyclindrical beam travels in a medium of refractive index `mu (I) = mu_(0) + mu_(2) I`, where `mu_(0)` and `mu_(2)` are positive constants and `I` is intensity of light beam. The intensity of the beam is decreasing with increasing radius.
Answer the following questions :
As the beam enters the medium, it will

A

diverge

B

convergent beam in each medium

C

diverge near the axis and converge near the periphery

D

travel as a cylindrical beam

Text Solution

Verified by Experts

The correct Answer is:
D

Beam is incident normally so does not diverge or converge so it travel as a cylindrical beam.
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