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Answer:
- Interference is caused when two or more waves coincide, and the resultant wave formed is either higher, lower or the same amplitude as the initial waves.
- For interference to occur, the intensity and the amplitude should be strong enough to produce a noticeable difference in the maxima and minima.
- The light source should be small enough to be considered a point source of light.
- For a constructive interference to occur, the phase difference between two certain waves should be an even multiple of π or the value 180°.
- For destructive interference to occur, the phase difference between two certain waves should be an odd multiple of π or the value 180°.
