A ray incident at a point at an angle of incidence θ enters into a glass sphere placed in air which is reflected and refracted at the farther surface of the sphere as shown in the figure. The angle between reflected and refracted rays at this surface is 90°. If refractive index of the sphere is, the √3 angle θ is :
(A) π/3
(B) π/4
(C) π/6
(D) 2π/3
