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# A ray OP monochromatic light is incident on the face AB of prism ABCD near vertex B at an incident angle of 60o (see figure). If the refractive index of the material of the prism is √3, which of the following is (are) correct?The ray gets totally internally reflected at face CDThe angle between the incident ray and the emergent ray is 120oThe ray comes out through face ADThe angle between the incident ray and the emergent ray is 90o

A
The angle between the incident ray and the emergent ray is 120o
B
The ray comes out through face AD
C
The ray gets totally internally reflected at face CD
D
The angle between the incident ray and the emergent ray is 90o
Solution
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#### Using snell's law at surface AB, CD and ADsin−11√3<sin−11√2Net deviation is 90o

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