One face of prism of refracting angle `30^@` and refractive index `1.414` is silvered. At what angle must a ray of light fall on the unsilvered face so that it retraces its path out of the prism ?

A prism having refractive index 1.414 and refracting angle 30^(@) has one of the refracting sufraces silvered .A beam of light incident on the other refracting surface will retrace its path, if the angle of incidence is

A ray of light is incident on the face AB of a glass prism ABC having vertex anlge A equal to 30^(@) . The face AC is silvered and a ray of light incident on the face AB retraces its path. If the refractive index of the material of prism is sqrt(3) find the angle of incidence on the face AB.

State the conditions under which total internal reflection occurs. One face of a prism with a refracting angle of 30^(@) is coated with silver. A ray incident on another face at an angle of 45^(@) is refracted and reflected from the silver coated face and retraces its path. Find the refractive index of the material of the prism.

The refracting angle of a prism is 60^(@) and the refractive index of its material is sqrt((7)/(3)). Find the minimum angle of incidence of a ray of light falling on one refracting face of the prism such that the emerging ray will graze the other refracting face.