The velocity of light in a medium is half its velocity in air. If a ray of light emerges from such a medium into air, the angle of incidenc, at which it will be totally internally reflected, is

The velocity of light in a medium is half its velocity in air. If ray of light emerges from such a medium into air, the angle of incidence, at which it will be totally internally reflected, is

The medium in which the speed of light is half of the speed in air, if light travels from such medium to air, then for what angle of incidence light will do total internal refelction ?

When a ray of light from air enters a denser medium, it :

When a ray of light enter from one medium to another, its velocity is doubled. The critical angle for the ray for two internal reflection will be

When a ray of light enters from one medium to another then its velocity in second medium becomes doubled. The maximum value of angle of incidence so that total internal reflection may not take place will be

A ray of light traveling in a trasparent medium falls on a surface separating the medium from air, at an angle of incidence of 45^(@) . The ray undergoes total internal reflection. If n is the refractive index of the medium with respect to air, select the possible values of n from the following.