If the refractive index of the material of a prism is cot(A/2), where A is the angle of prism then the angle of minimum deviation will be
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If the refractive index of the material of a prism is cot(A/2), where A is the angle of prism then the angle of minimum deviation will be

G1 Physics · Accepted Answer

For a prism at minimum deviation, μ = sin[(A + δₘᵢₙ)/2] / sin(A/2) Given, μ = cot(A/2) Therefore, cos(A/2) = sin[(A + δₘᵢₙ)/2] So, (A + δₘᵢₙ)/2 = π/2 - A/2 Hence, δₘᵢₙ = π - 2A Correct option: A.