Physics
Assertion (A): If the angles of the base of a prism are equal, then in the position of minimum deviation, the refracted ray will pass parallely to the base of the prism.
Reason (R): For minimum deviation, angle of incidence is equal to the angle of emergence.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- assertion is false but reason is true.
- assertion is true but reason is false.
Refraction Plane Surfaces
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation
Assertion (A) is true. If the angles of the base of a prism are equal, then at minimum deviation condition for prism the angle of incidence is equal to the angle of emergence and the refracted ray inside the prism is parallel to the base of the prism
Reason (R) is true. For the minimum deviation to occur, the angle of incidence must be equal to the angle of emergence. This ensures that the deviation caused by the prism is minimized.
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