For an isosceles prism of angle A and refractive index μ, it is found that the angle of minimum deviation δm= A. Which of the following options is/are correct?
(A) For the angle of incidence i1 = A, the ray inside the prism is parallel to the base of the prism
(B) For this prism, the refractive index μ and the angle of prism A are related as A = 1/2 cos -1 (μ/2)
(C) At minimum deviation, the incident angle i1 and the refracting angle r1 at the first refracting surface are related by r1 = (i1/2)
(D) For this prism, the emergent ray at the second surface will be tangential to the surface when the angle of incidence at the first surface is i1 = sin-1( sinA√(4cos2 A/2 - 1 - cosA))