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Q.

A ray of light undergoes a minimum deviation of 60° when incident on an equilateral prism made of material of refractive index 3. The angle made by the path of the ray inside the prism with the base of the prism is 

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a

45°

b

30°

c

60°

d

answer is D.

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Detailed Solution

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When minimum deviation occurs for a ray passing through the prism, the path of the ray inside the prism will be parallel to the base

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A ray of light undergoes a minimum deviation of 60° when incident on an equilateral prism made of material of refractive index 3. The angle made by the path of the ray inside the prism with the base of the prism is