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प्रश्न
In the following ray diagram the correctly marked angle are:
(a) ∠i and ∠e
(b) ∠A and ∠D
(c) ∠i, ∠e and ∠D
(d) ∠r, ∠A and ∠D
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उत्तर
(d) ∠r, ∠A and ∠D
The angle between the normal and the incident ray is the angle of incidence.
The angle between the normal and the emergent ray is the angle of emergence.
The correctly marked angles are shown in the diagram below:
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