Physics M.C.Q (1 Marks)

de-Broglie wavelength is :

Two sources of monochromatic light in coherent, when their :

The fringe width in interference of light due to two coherent sources is :

The wavelength of which colour is minimum ?

Width of interference fringe is :

The wavefront due to point source at a finite distance from the source is :

Which of the following phenomena taken place when a monochromatic light is incident on a prism ?

Optical fibre communication is based on which of the following phenomena :

Brewster's law is :

A thin film of oil is spread over the surface of water. In sun light beautiful colours are seen on the film due to :

When a ray of light enters a glass slab its wavelength :

The reason of colour in thin film is :

The wavelength of a monochromatic light is 6000 Å in vacuum. When it enters in the glass slab of refractive index 2 its wavelength will be :

The equivalent path of an optical path of length 't' in glass slab of refractive index n in vacuum is :

The angle between the plane of vibration and plane of polarisation is :

Out of the following sources which gives best monochromatic light ?

In the phenomenon of refraction of light which of the following quantities do not change ?

A light rays beam enters from air into water. Out of the following which will not be changed ?

Two light waves of equal amplitude and wavelength are super imposed. The amplitude of the resultant wave will be maximum when the phase difference between them is :

A plane wavefront is a part of a :