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NEET 2011 Physics question

PhysicsRay Optics and Optical InstrumentsNEET 2011

A thin prism of angle made of glass of refractive index is combined with another prism of glass of refractive index . The combination of the prism produces dispersion without deviation. The angle of the second prism should be :

Answer: (2)

Solution

For thin prisms the deviation is . For no deviation of the combination (the prisms placed with their bases opposite), in magnitude: . $ =

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Question ID VK-090760