Parallel rays are incident on a transparent sphere along its one diameter. After refraction, these rays converge at the other end of this diameter. The refractive index for the material of sphere is

A ray of light is incident normally on one of the refracting surfaces of prism of refracting angle 60^@ . The emergent ray grazes the other refracting surface. The refractive index of the material of the prism is

A ray of light falls on a transparent sphere with centre at C as shwon in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is

A ray of light falls on a transparent sphere with centre at C as shown in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is

A ray of light falls on a transparent sphere with centre at C as shown in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is

A ray of light falls on a transparent sphere with centre at C as shwon in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is

A ray of light falls on a transparent sphere with centre at C as shown in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is

A ray of light falls on a transparent sphere with centre at C as shown in figure. The ray emerges from the sphere parallel to line AB. The refractive index of the sphere is

A point source of light is kept on the surface of a sphere and it is found that parallel light rays emerge from the other side of the sphere. What is refractive index of material of the sphere ?