[" 4.If one face of a prim of prim angle "30^(@)" and "],[mu=sqrt(2)" slivered,the incident rey retraces its initial "],[" path.The angle of incilence is "]

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 ?

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= 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= sqrt2 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