Optics

When light waves pass from air to glass the variable affected are—

When light passes from one medium to another medium, which one of the followings does not change :

When a ray of light travels from a denser medium to a rarer medium then

The formation of glittering colours in thin foam of soap is the result of which of the following phenomenon –

Total internal reflection can take place when light travels from :

A cut diamond shines brilliantly due to

The diamond appears lustrous because of :

Given below are two statements, one labeled as Assertion (A) and other labeled as Reason (R): Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape. Reason (R): The refractive index of diamond is less than that of glass. In the context of the above two statements, which one of the following is correct?

Optical fibre works on the principle of:

The phenomenon used in optical fiber for transmission of light energy is