A ray incident at an angle of incidence ${60}^{\circ }$ enters a glass sphere of refractive index $\mu =\sqrt{3}$. This ray is reflected and refracted at the farther surface of the sphere. The angle between reflected and refracted rays at this surface is

Q. A ray incident at a point at an angle of incidence of ${60}^o$ enters a glass sphere of refractive index $\sqrt{3}$ and is reflected and refracted at the farther surface of the sphere. The angle between the reflected and refracted rays at this surface is:

Q. A light ray enters a solid glass sphere of refractive index $\mu =\sqrt{3}$ at an angle of incidence ${60}^{\circ }$. The ray is both reflected and refracted at the farther surface of the sphere. The angle (in degrees) between the reflected and refracted rays at this surface is

Q. A ray incident at a point at an angle of incidence $60$${}^{\circ }$ enters a glass sphere of $\mu =\sqrt{3}$ and is reflected and refracted at the further surface of the sphere. The angle between the reflected and refracted rays at this surface is :

Q. A ray incident at a point at an angle of incidence $\theta$ 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 ${90}^0$. If refractive index of the sphere is $\sqrt{3},$ the angle $\theta$ is :