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A ray of light PQ is incident on the fac...

A ray of light PQ is incident on the face AB of an equilateral glass prism ABC as shown in the figure. Show that angle of emergence = angle of deviation. Also, with a ray diagram, trace the path of the emergent ray.

Text Solution

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Here, B is the vertex of the prism and `angleB` is the angle of prism.
i + e = B+D.
From geometry we have `B = 60^@, i = 60^@`
`therefore` e=D
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