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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

travel as a cylindrial beam

B

diverage

C

converge

D

diverge near the axis and converge near the periphery

Text Solution

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The correct Answer is:
3
Since intensity of beam decreasing with increasing radius,mean it maximum towards axis therefore beam will converse.
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