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A ray of light is incident on a glass sl...

A ray of light is incident on a glass slab of thickness t and refractive index `mu` in such a way that the reflected ray and the refracted ray are at right angles to each other. Calculate the angle of incidence and the lateral displacement of the emergent ray.

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The correct Answer is:
`tan^(-1)mu;(tsqrt(mu^(2) - 1))/(musqrt(mu^(2) + 1))`
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