Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) A diverging beam of light from a point source S having divergence angle `alpha` falls symmetrically on a glass slab as shown. The angles of incidence of the two example rays are equal. If the thickness of the glass slab is its t and its refractive index is n, then divergence angle of the emergent beam is - Sarthaks eConnect

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

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

A.

zero

B.

`alpha`

C.

`sin^-1(1/n)`

D.

`2sin^-1(1/n)`

Solution

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Best answer

Divergence angle will remain unchanged because in case of a glass slab every emergent ray is parallel to the incident ray. However, the rays are displaced slightly towards outer side.