InterviewSolution
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InterviewSolution
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A ray of light is incident at small angle I on the surface of prism of small angle A and emerges normally from the oppsite surface. If the refractive index of the material of the prism is mu, the angle of incidence is nearly equal toA. `A/mu`B. `A/(2mu)`C. `muA`D. `(muA)/(2)` |
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Answer» Correct Answer - C As refracted ray emerges normally from opposite surface, `r_(2) = 0` As `A = r_(1) + r_(2) :. r_(1) = A` Now, `mu = (sini_(1))/(sinr_(1)) = (i_(1))/(r_(1)) = (i)/(A)` or `I = muA` |
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