Light is incident at an angle `alpha` on one planar end of a transparent cylindrical rod of refractive index `mu`. Determine the least value of `mu` so that the light entering the rod does not emerge from the curved surface of rod irrespective of the value of `alpha` `

What should be the value of refractive index n of a glass rod placed in air, so that the light entering through the flat surface of the rod does not cross the curved surface of the rod?

Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidence.

Light enters at an angle of incidance in a tranjsparent road of refractve index mu. for what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidance ?

Monochromatic light falls at an angle of incidence i on a slab of a transparent material (refractive index mu ). If reflected and refracted rays are mutually perpendicular, find the relation between mu and i .

A ray of light is incident at an angle of 60^(@) on one face of a prism which has refracting angle of 30^(@) . The ray emerging out of the prism makes an angle of 30^(@) with the incident ray. If the refractive index of the material of the prism is mu=sqrt(a) , find the value of a .

A ray of light enters the face AB of a glass prism of refractive index mu at an angle of incidence i . Find the value of i such that no ray emerges from the face AC of the prism, given angle of prism is A .

A parallel beam of light is incident from air at an angle alpha on the side of right angled triangular prism of refractive index mu = sqrt(2) . Light undergoes total internal reflection in the prism at the face PR when alpha has a minimum value of 45^@ . The angle theta of the prism is. .

A ray of light the face AB of a glass prism of refractive index mu at an angle of incidence i . Find the value of i such that no ray emerges from the face AC of the prism. Given angle of prism is A .