The refractive index of the material of a prism is 2 and the angle of the prism is 30o. One of the two refracting surface of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is?
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Correct option is D)
Using Snell's Law, 1×sini=μ×sinr
option 4 is correct
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