An object O is stuck on the surface of atransparent solid spher of radius 20cm. The refractive index of the plane of the sphere such that rays from the object after refraction from the opposoite side emerge as a parallel beam is?
An object O is stuck on the surface of atransparent solid spher of radius 20cm. The refractive index of the plane of the sphere such that rays from the object after refraction from the opposoite side emerge as a parallel beam is?