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The figure shows a transparent slab of l...

The figure shows a transparent slab of length m placed in air whose refractive index in x direction varies as `mu = 1 + x^(2)(0 lt x lt 1)`. The optical path length of ray R will be

A

1m

B

`2/3`m

C

`4/3` m

D

`sqrt(2)` m

Text Solution

Verified by Experts

The correct Answer is:
C
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