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

The figure shows a transparent slab of length m placed in air whose re

1.	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
Answer» 1M `(2)/(3)m` `(4)/(3)m` `SQRT(2)m` Answer :C

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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

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