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

get the wavefront due to a point source at a finite distance from the source is from screen.

The wave front due to a point source at a finite distance from the source is

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Question

The wave front due to a point source at a finite distance from the source is -

A

Spherical

B

Cylindrical

C

Plane

D

Circular

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Updated on : 2022-09-05

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Correct option is A)

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What type of wavefront will emerge from aA. Point sourceB. Distant light source

What type of wavefront will emerge from aA. Point sourceB. Distant light source. Ans: Hint: Wavefront is an imaginary surface that represents the locus of all the points in an optical field having the same phase at a given instant.General properties ...

What type of wavefront will emerge from a

A. Point source

B. Distant light source

Last updated date: 22nd Jan 2023

• Total views: 164.4k • Views today: 1.60k Answer Verified 164.4k+ views 1 likes

Hint: Wavefront is an imaginary surface that represents the locus of all the points in an optical field having the same phase at a given instant.

General properties of a wavefront are:

A wavefront is dependent on the shape of the source of disturbance

A wavefront does not travel backwards.

A wavefront is normal to the light rays.

Types of wavefronts:

Spherical wavefront: Very similar to ripples in water, this wavefront is produced by a point source.

Plane wavefront: Rays coming from a distant source generate a plane wavefront.

Cylindrical wavefront: When the light rays converge or diverge from a lens a cylindrical wavefront is formed.

Complete step by step solution:

Point source is that source which is so small that it is considered as a single point. Such sources are dimensionless.

The wavefront emerging from a point source is the spherical wavefront since the waves travel radially outwards from the source.

Hence the wavefront for a point source is spherical.

A distant source is so far away that it is considered to be at infinity, the rays travelling from a distant light source are taken as planes moving in the direction of propagation of waves. And hence the wavefront is a plane wavefront.

Hence the wavefront emerging from a distant source is a plane wavefront.

Note:

Wavefront is the locus of all the points in the field which have the same phase at a given instant. This means that even if the phase is the same at different points in time, the two points may or may not be considered as a part of the wavefront. Also, we must keep in mind that the direction of propagation of the wavefront is the direction of propagation of the wave.

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The wave front due to a point source at a finite distance from the

The wave front due to a point source at a finite distance from the source is-A SphericalB CylindricalC PlaneD Circular

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The wave front due to a point source at a finite distance from the source is-A SphericalB CylindricalC PlaneD Circular

Answer :

A Spherical

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