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Angular Deviation

The sides of ...

Question

The sides of an isosceles right prism are coated with a reflecting coating . A ray of light falls on the hypotenuse at an arbitrary angle, i . For what value of'i' the ray leaving the prism is parallel to the incident ray?

A

30⁰

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B

60⁰

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C

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D

Any arbitrary angle

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Solution

The correct option is D
Any arbitrary angle

The emergent ray becomes parallel to the incident ray after two reflections from the two mirrors placed at right angles.

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