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Why can not two independent monochromatic sources produce sustained interference pattern?

Why can not two independent monochromatic sources produce sustained interference pattern?

In other words, they should emit continuous light waves (of the same wavelength or frequency) that have either the the same phase or a constant phase difference. Two independent monochromatic sources are not coherent. Hence, they cannot produce a sustained interference pattern.

Can two independent laser beams produce sustained interference pattern?

Yes, it is possible.

Can sustained interference take place from two sources of light?

For sustained interference, the intensity at any point should not change with time. Thus, as the amplitude of the two waves remains constant, to obtain a sustained interference of light the two sources of light must have a constant phase difference. So, the correct answer is “Option A”.

Why can’t two independent monochromatic sources of light emitting light of one and the same wavelength behave as coherent sources?

Wave Optics. (a) (i) ‘Two independent monochromatic sources of light cannot produce a sustained interference pattern’. Two sources are monochromatic if they have the same frequency and wavelength. Since they are independent, i.e. they have different phases with irregular difference, they are not coherent sources.

Can interference pattern be formed due to two independent source?

In practice, a sustained interference pattern cannot be obtained by using two independent sources of light. It is because of the following reasons: Two independent sources of light can’t emit waves continuously. The waves emitted by two independent sources of light do not have same phase or a constant phase difference.

Can 2 independent sources of light be coherent?

The two independent sources cannot be coherent because of the fact that independent sources cannot maintain a constant phase difference between them. For experimental purposes, two virtual sources obtained from a single parent source can act as coherent.

What happens when two separate light sources illuminate a wall?

When the phase difference between the two vibrating sources che rapidly with time, we say that the two sources are incoherent and this happens the intensities just add up. This is indeed what hap when two separate light sources illuminate a wall.

What are the two conditions for obtaining sustained interference?

Condition for sustained interference are: (i) The two sources of light should emit light continuously. (ii) The two waves must be in same phase or bear a constant phase difference.

Can two real sources of light act as coherent because?

The two independent light sources cannot act as coherent sources because of the fact that independent sources cannot maintain a constant phase difference between them.

Can two independent sources be obtained from one incoherent sources?

Two independent sources of light cannot be coherent sources. This is because light emitted by individual atoms of the light sources is the random and so light source is random and so the light from these atoms are not in phase. Thus, two independent sourced of light are incoherent sources.

Can two real sources of light be coherent?

Two independent sources of light cannot be coherent. This is because light is emitted by individual atoms, when they return to ground state. Even the smallest source of light contains billions of atoms which obviously cannot emit light waves in the same phase.

Why does sustained interference need two independent sources of light?

So, sustained interference is necessary for coherence. In practice, a sustained interference pattern cannot be obtained by using two independent sources of light. It is because of the following reasons: Two independent sources of light can’t emit waves continuously.

How can two independent monochromatic sources produce sustained interference pattern?

Deduce, with the help of Young’s arrangement to produce interference pattern, an expression for the fringe width. To produce a sustained interference pattern, the two sources of light must be coherent.

When do two waves produce an interference pattern?

Two sources of light waves are said to be coherent if the initial phase difference θ between the waves emitted by the sources remains constant in time. If θ changes randomly with time, the sources are called incoherent. Two waves produce interference pattern only if, they originate from coherent sources.

What happens to waves from two independent sources?

And if you two independent sources, then the waves from two points in two sources will have a definite phase relationship only for 10 − 8 second and accordingly interference pattern formed by them will last on the screen only for this much time.