The two slits in Young's double-slit experiment are illuminated by two different sodium lamps emitting light of the same wavelength. No interference pattern will be observed on the screen. Mark 0 for False and 1 for True.

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Solution

Sodium lamp is quasi mono chromatic.
Therefore, the special coherence of one lamp is not same as the other. Interference is never observed when the two slits are illuminated by two different sources of same wavelength because waves emitted from two different sources are not coherent in space and time.
So the above statement is True.

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