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Under minimum deviation condition in a prism, if a ray is incident at an angle of 30, the angle between the emergent ray and the refracting surface of the

prism is


In the case of minimum deviation 2i=A+δ.
And in the minimum deviation in a regular prism (angle of prism is 60 Degree) the angle of emergence is 30 degrees  and the angle between the refracting surface  and the emergent ray will be 150 degrees
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