#### Question

Study the following figure in which a student has marked the angle of incidence (∠*i*), angle of refraction (∠*r*), angle of emergence (∠*e*), angle of prism (∠A) and the angle of deviation (∠D). The correctly marked angles are

(a) ∠A and ∠i

(b) ∠A, ∠*i* and ∠*r*

(c) ∠A, ∠*i*, ∠*e* and ∠D

(d) ∠A, ∠*i*, ∠*r* and ∠D

#### Solution

The correctly marked angles in the given figure are the angle of prism (*A*) and the angle of incidence (*i*).

All the angles are correctly marked in the figure shown below.

Hence, the correct answer is option (a).

Is there an error in this question or solution?

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The Correctly Marked Angles Concept: Dispersion by a Prism.

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