Question

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Answer 1

Explanation:

Solution

In the case of reflection, the angle of incidence is equal to the angle of reflection. Then the angle between the incident light ray and the reflected light ray is equal to i+r,i.e., 2i. Draw an imaginary line extending the incident light ray which is the actual path of the light ray. The angle between the incident light ray and the actual path of the light ray is 180∘. Then the angle of deviation is the angle between the reflected light ray and the actual path of the light ray, i.e., 180∘−2i