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Two light sources are said to be coherent if they are obtained fromA. Two independent point sources emitting light of the same wavelengthB. A single point sourceC. A wide sourceD. Two ordinary bulbs emitting light of different wavelengths

Answer» Correct Answer - B
When two sources are obtained from a single source the wavefront is divided into two parts. These two wavelengths acts as if they emanated from two sources having a fixed phase relationship.


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