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KCET2009PhysicsWave Optics

Two sources are said to be coherent if they produce waves

Options

  1. Ahaving a constant phase difference
  2. Bof equal wavelength
  3. Cof equal speed
  4. Dhaving same shape of wavefront

Correct answer

A. having a constant phase difference

Step-by-step solution

Phase difference = 2 (path difference) The phase difference is independent of time and depends only on the path difference (x₂-x₁ ) . This holds only if the two sources are 'coherent', ie, they have a constant fixed phase difference between them.

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