A thin glass prism has refractive index 1.5 . The correct relation between the angle of minimum deviation ( m) and angle of refraction (r) is

Step-by-step solution

For a thin prism, the angle of minimum deviation is given by _m = ( - 1)A . At the position of minimum deviation, the angle of refraction r inside the prism is r = A 2 , which gives A = 2r . Given the refractive index = 1.5 . Substituting the values into the deviation formula, we get: _m = (1.5 - 1)(2r) _m = 0.5 2r _m = r Answer: m = r