A diverging beam of light from a point source S having divergence… - Vidyadip

MCQ

A diverging beam of light from a point source S having divergence angle a, 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

A
Zero
✓
$\alpha$
C
$\sin ^{-1}(1 / n)$
D
$2 \sin ^{-1}(1 / n)$

✓

Answer

Correct option: B.

$\alpha$

$\alpha$

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