Question

A diverging beam of light from a point source s having divergence angle α , falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index n, then the divergence angle of the emergent beam is

Answer 1

Answer:

Angle of incidence = angle of emergence in glass slab

Explanation:

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