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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2004
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The refractive index of the material of a prism is $\sqrt 2$and its refracting angle is 30º. 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 form the mirrored surface if its angle of incidence on the prism is


( A ) 60$^{\circ}$
( B ) 0$^{\circ}$
( C ) 30$^{\circ}$
( D ) 45$^{\circ}$

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