Difference between Coherent sources and Incoherent sources

Difference between Coherent sources and Incoherent sources

Coherent sources and incoherent sources both are the light sources or it can be a sound wave sources depending on their frequency and phase difference. The sources which emits the light of constant phase and same frequency are called as coherent sources. The sources which emits the light of random frequency and different phase are called as incoherent sources. When two waves produces the interference pattern so these waves are originates from coherent source. In coherent sources the atoms are behaves in a cooperative manner. The difference between the coherent sources and incoherent sources is as follows.

              Coherent source                  Incoherent source
1) The sources of light wave are said to be coherent when phase difference between the waves emitted by the source is constant.

2) Coherent sources can emit highly monochromatic light.

3) In coherent sources the light waves comes from the groups of atom and these groups act dependent on each otherother i.e they are in same step.

4) The light waves originated from the coherent sources are of single frequency.

Examples: Laser light, Sound waves.

1) The sources of light wave are said to be incoherent source when phase difference between the waves emitted by the source is changes randomly.

2) Incoherent sources cannot emit a highly monochromatic light.

3) In incoherent sources light is emitted by the atoms in discrete steps.

4) The light waves originates from the incoherent sources are of different frequency.

Example: Light from the sun, Electric bulb.

Updated: February 22, 2022 — 2:36 pm

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