Difference between Interference and Diffraction - QS Study
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Difference between interference and diffraction:

Interference

  • Interference is the result of interaction of two different wave fronts originating from the same source.
  • It is due to the superposition of secondary wavelets from two different wave fronts produced by two coherent sources.
  • Fringes are equally spaced.
  • Bright fringes are of same intensity
  • Comparing with diffraction, it has large number of fringes
  • All bright bands are of uniform intensity.

Diffraction

  • Diffraction is the result of interaction from different parts of the same wave front.
  • It is due to the superposition of secondary wavelets emitted from various points of the same wave front.
  • Fringes are unequally spaced.
  • Intensity falls rapidly
  • It has less number of fringes
  • All bright bands are not of the same intensity.