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 ?

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.

Angle of a prism is 30^(@) and its refractive index is sqrt(2) and one of the surface is silvered. At what angle of incidence, a ray should be incident on one surface so that after reflection from the silvered surface, it retraces its path ?

Angle of a prism is 30^(@) and its refractive index is sqrt(2) and one of the surface is silvered At what angle of incidence a ray should be incident on one surface so that after reflection from the silvered surface it retraces its path

Calculate the angle of incidence on the face of a prism of refracting angle 60^(@) and of refractive index 1.5, for which the emergent ray just grazes the other face.

One face of a prism of refractive index 1.5 and angle 75^(@) is covered with a liquid of refractive index (3sqrt(2))/(4) . What should be the angle of incidence of light on the clear face of prism for which light is just totally refracted at the liquid covered face ?

One face of a prism of refractive index 1.5 and angle 75^@ is covered with a liquid of refractive index (3 sqrt(2))/(4) . What should be the angle of incidence of light on the clear face of prism for which light is just totally reflected at the liquid covered face ?

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