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State the Conditions to Get Steady Interference Pattern. - Physics

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Short Note

State the conditions to get steady interference pattern.

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Solution

  1. The two sources of light must be coherent, i.e., there is a constant phase difference between the light waves emitted by the two sources. (This condition is met only if the two sources are derived from the same source.)
  2. The two sources of light must be monochromatic, i.e., the light emitted is of the same wavelength.
  3. The light waves emitted by the two sources must be of equal amplitudes or the sources must be of same intensity.
  4. The two sources must be narrow. Point sources of light in the form of illuminated slits are used.
  5. The two sources should be close to (near) each other.
  6. The two sources should emit waves in nearly the same direction.
Concept: Interference of Light
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