7 Two prisms of prism angles A and A are placed in contact with each other with second prism upside down The refractive indices

Question

7 Two prisms of prism angles A and A are placed in contact with each other with second prism upside down The refractive indices for violet and red colours for their materials are u 1 753 MR 1 751 and 1 758 R 1 754 A white light ray when made to fall upon combination from one side emerges from the other side such that the constituents colour rays are parallel to pach other If A 5 then A

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