[" Ans.cot ( "A/2)" ."],[" One face of a prism of refracting angle "30^(@)" is silvered.At what angle a "],[" ray of light should fall on the unsilvered face so that the ray "],[" finally retraces its path.The refractive index of the material of the "],[" prism is "sqrt(2)" ."],[" A "-15^(@)]

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 ?

The face AC of a prism ABC of refracting angle 30^@ is silvered . A ray is incident on face AB at an angle of 45^@ as shown in figure . The refracted ray undergoes reflection at face AC and retraces its path . The refractive index of the prism is

A ray of light is incident normally on one face of a right-angled isosceles prism and then it grazes the hypotenuse. The refractive index of the material of the prism is

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

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.

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 prism ABC of angle 30^(@) has its face AC silvered. A ray of light incident at an angle of 45^(@) at the face AB retraces its path after refraction at face AB and reflection at face AC . The refractive index of the material of the prism is