The angle of deviation by a prism is $(180^{o} - 2 A)$ . Its critical angle will be

s i n^{- 1} (t a n \frac{A}{2})

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(c o t \frac{A}{2})

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c o s^{- 1} (c o t \frac{A}{2})

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c o s^{- 1} (t a n \frac{A}{2})

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Solution

The correct option is B $(c o t \frac{A}{2})$
$Refractiveindexμ=sin(A+δm2)sinA2=cotA2Hence,theoptionBisthecorrectanswer.$

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Similar questions

Q. The refracting angle of a prism is A and the refractive index is

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For an isosceles prism of angle $A$ and refractive index $μ$ , it is found that the angle of minimum deviation $δ_{m} = A$ . Which of the following option(s) is/are correct?

(cosecA-cotA)²=1-cosA/1+cosA

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The angle of deviation by a prism is (180o−2A). Its critical angle will be

The correct option is B (cotA2)Refractiveindexμ=sin(A+δm2)sinA2=cotA2Hence,theoptionBisthecorrectanswer.

The angle of deviation by a prism is $(180^{o} - 2 A)$ . Its critical angle will be

The correct option is B $(c o t \frac{A}{2})$
$Refractiveindexμ=sin(A+δm2)sinA2=cotA2Hence,theoptionBisthecorrectanswer.$