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QAIPMT-2004-Ph-2629: NEET 2004 Physics - Class 12 AIPMT-2004-Ph-2629 Solution: The refractive index of the material of a prism is \( {2}\) and …

The refractive index of the material of a prism is 2\sqrt{2} and its refracting angle is 30∘30^\circ. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection from the mirrored surface if its angle of incidence on the prism is

Multiple Choice Options

  • A 45∘45^\circ
  • B 60∘60^\circ
  • C 0
  • D 30∘30^\circ

Step-by-Step Verified Solution

Using law of triangle, we get _ r = 30 o _ = sin _ i sin _ r _ 2 _ sin _ 30 _ = sini _ sini = 1 2 _ i = 45 o

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