Physics
A ray of light PQ is incident normally on the face AB of an equilateral prism. The ray gets totally reflected from the surface AC.
Calculate:
(a) the angle of deviation at AC.
(b) the angle of incidence at BC.
Refraction Plane Surfaces
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Answer
From the below diagram,
(a) As, the incident ray and emergent ray makes an angle of 60° with each other.
So, angle of deviation at AC is 60°.
(b) Here, emergent ray is falling normally on face BC.
So, angle of incidence at BC is 0°.
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