Define coherent sources of light and it’s production method.
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Two sources are said to be coherent if they have exactly the same frequency and zero or constant phase difference between them.
Methods to produce them:
1. Division of wavefront where wavefront is divided into two parts by reflection,refraction or diffraction .
2. Division of amplitude in 2 parts.
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A coherent light source is a light source that is capable of producing radiation with waves vibrating in phase.
The laser is an example of a coherent light source.
Explanation:
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