A ray of light incident on a slab of transparent material is partly reflected from the surface and partly refracted into the slab. The reflected and refracted rays are mutually perpendicular. The incident ray makes an angle i with the normal to the slab. the refreactive index of the slab is

A ray of light incident on a slab of transparent material is partly re

1.	A ray of light incident on a slab of transparent material is partly reflected from the surface and partly refracted into the slab. The reflected and refracted rays are mutually perpendicular. The incident ray makes an angle i with the normal to the slab. the refreactive index of the slab is
Answer» `TAN^(-1)(i)` `cot^(-1)(i)` `sin^(-1)(i)` `COS^(-1)(i)` ANSWER :A

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A ray of light incident on a slab of transparent material is partly reflected from the surface and partly refracted into the slab. The reflected and refracted rays are mutually perpendicular. The incident ray makes an angle i with the normal to the slab. the refreactive index of the slab is

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