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In an experiment for determination of refractive index of glass of a prism by i v/s δ plot, it was found that a ray incident at angle 35 o , suffers a deviation of 40 o and that it emerges at angle 79 o . In that case which of the following is closest to the maximum possible value of the refractive index?

Options

  1. A1.7
  2. B1.8
  3. C1.5
  4. D1.6

Correct answer

C. 1.5

Step-by-step solution

i = 35 o ,   δ = 40 o ,   e = 79 o δ = i + e - A 40 o = 35 o + 79 o - A A = 74 o And r 1 + r 2 = A = 74 o Since δ m i n < 40 o μ < sin ⁡ 74 + 40 2 sin ⁡ 37 μ m a x = 1.44

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