Two light sources are said to be coherent if | vedclass

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(B) Two light sources are coherent if they emit light waves of the same frequency and maintain a constant phase difference over time. When two sources

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$A$ single point source

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(B) Two light sources are coherent if they emit light waves of the same frequency and maintain a constant phase difference over time. When two sources are derived from a single original source (e.g.,using a slit or a mirror),the wavefront is divided into two parts. These two resulting wavefronts act as if they emanated from two sources having a fixed phase relationship,thus satisfying the condition for coherence.

Two light sources are said to be coherent if they are obtained from

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