The refracting angle of a prism is \( \underline{A} \) and the refractive index of the material ....

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The refracting angle of a prism is \( \underline{A} \) and the refractive index of the material of the prism is
\( \mathrm{P} \)
\( \cot \frac{A}{2} \). The angle of minimum deviation is-
(1) \( 180^{\circ}-3 \mathrm{~A} \)
(2) \( 180^{\circ}+2 \mathrm{~A} \)
(3) \( 90^{\circ}-\mathrm{A} \)
(4) \( 180^{\circ}-2 \mathrm{~A} \)


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