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Question
State any four Conditions for Obtaining well–defined and Steady Interference Patterns.
Solution
Conditions for obtaining well – defined and steady interference pattern:
- The two sources of light must be coherent.
- The two sources of light must be monochromatic.
- The two interfering waves must have the same amplitude.
- The separation between the two slits (d) must be small in comparison to the distance between the plane containing the slits and the observing screen (D).
- The two slits should be narrow.
- The two waves should be in the same state of polarization.
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