question_answer

For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material whose refractive index                                           [AIPMT (M) 2012]

A)  lies between \[\sqrt{2}\] and 1

B)  lies between 2 and \[\sqrt{2}\]

C)  is less than 1

D)  is greater than 2

Correct Answer: B

Solution :

In given situation value of A varies from 0 to    .

So,

and