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A prism of refractive index μ and angle of prism A is placed in the position of minimum angle of deviation. If minimum angle of deviation is also A , then in terms of refractive,

Options

  1. A2 cos - 1 μ 2
  2. Bsin - 1 μ 2
  3. Csin - 1 μ - 1 2
  4. Dcos - 1 μ 2

Correct answer

A. 2 cos - 1 μ 2

Step-by-step solution

μ = sin A + δ min 2 sin A 2 μ = sin A + A 2 sin A 2 μ = sin A sin A 2 = 2 cos A 2 A = 2 cos - 1 μ 2

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