Geometrical OpticsHard

Question

For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must bemade of a material whose refractive index

Options

A.is greater than 2
B.lies between √2 and 1
C.lies between 2 and √2
D.is less than 1

Solution

           δm = A
⇒   μ = 2 cos
For δm = A
Hence, μ lies between 2 and √2

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