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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.
30 . At the beam enters the medium, it will

A

converge

B

diverge near the axis and converge near the periphery

C

travel as a cylindrical beam

D

diverge

Text Solution

Verified by Experts

The correct Answer is:
A
As the medium is denser w.r.t. vacuum, therefore, on entering the medium, it will converge.
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