The angle of minimum deviation for an incident light ray on an equilateral prism is equal to its refracting angle. The refractive index of its material is

Step-by-step solution

For an equilateral prism, angle of prism of refracting angle A =60^ Here, _ m = A =60^ Refractive index, aligned = ( A + _ m 2 ) A 2 = ( 60^ +60^ 2 ) ( 60^ 2 ) =& 60^ 30^ = 60^ 60^ = 60^ = 3 aligned