Ray Optics Test...

The phenomenon utilized in an optical fibre 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

A ray of light propagates from glass (refractive index= 3/2) to water (refractive index = 4/3). The value of the critical angle

Relation between critical angles of water and glass is

Optical fibres are related with

Brilliance of diamond is due to

The critical angle for a medium is 60°. The refractive index of the medium is

Glass has refractive index µ with respect to air and the critical angle for a ray of light going from glass to air is θ. If a ray of light is incident from air on the glass with angle of incidence θ, the corresponding angle of refraction is

An endoscope is employed by a physician to view the internal parts of a body organ. It is based on the principle of

A normally incident ray reflected at an angle of 90°. The value of critical angle is