MCQ
Two light sources are said to be coherent if they are obtained from
  • A
    Two independent point sources emitting light of the same wavelength
  • A single point source
  • C
    A wide source
  • D
    Two ordinary bulbs emitting light of different wavelengths

Answer

Correct option: B.
A single point source
b
(b)When two sources are obtained from a single source, the wavefront is divided into two parts. These two wavefronts acts as if they emanated from two sources having a fixed phase relationship.

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