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A transparent cylinder has its right half polished so as to act as a mirror. A paraxial light ray is incident from left that is parallel to principal axis, exits parallel to the incident ray as shown. Find the refractive index n of the material of the cylinder

a
2
b
4
c
8
d
0

detailed solution

Correct option is A

Sin⁡θSin⁡θ/2=θθ/2=μ∴μ=2

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