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Q. Minimum deviation is observed with a prism having angle of prism A, angle of deviation $ \delta , $ angle of incident $ i $ and angle of emergence e, then we have generally:

JIPMERJIPMER 2002

Solution:

A prism which has angle of prism A angle of deviation $ \delta , $ angle of incidence $ i $ and angle of emergence $ e, $ then the minimum deviation is observed if we have generally angle of incidence $ i= $ angle of emergence $ e $ .