If one face of a prism angle `30^(@) "and" mu= sqrt2` is silvered , the incident ray retraces its initial path. What is the angle of incidence?

If one face of a prism angle 30^(@) and mu=sqrt( 2) is silvered, the incident ray retraces its initial path. What is the angle of incidence ?

One of the refracting surfaces of a prism of angle 30^(@) is silvered. A ray of light incident at angle of 60^(@) retraces its path. The refractive index of the material of prism is

One of the refracting surfaces of a prism of angle of 30^(@) is silvered. A ray of light incident at an angle of 60^(@) retraces its path. The refractive index of the material of prism is

One of the refracting surfaces of a prism of angle of 30^(@) is silvered. A ray of light incident at an angle of 60^(@) retraces its path. The refractive index of the material of prism is

A ray of light is incident at 60^(@) on one face of a prism of angle 30^(@) and the emergent ray makes 30^(@) with the incident ray.the refractive index of the prism is

One face of a prism with a refrective angle of 30^@ is coated with silver. A ray of light incident on another face at an angle of 45^@ is refracted and reflected from the silver coated face and retraces its path. What is the refractive index of the prism?