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(D) For destructive interference to occur,the two light waves must arrive at a point with a phase difference that results in the cancellation of their

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$\pi, 3\pi, 5\pi, \ldots$

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(D) For destructive interference to occur,the two light waves must arrive at a point with a phase difference that results in the cancellation of their amplitudes.This occurs when the waves are in anti-phase,meaning one wave is at a crest while the other is at a trough.The condition for destructive interference is given by the phase difference $\Delta \phi = (2n + 1)\pi$,where $n = 0, 1, 2, \ldots$.Substituting values for $n$,we get $\Delta \phi = \pi, 3\pi, 5\pi, \ldots$.

If two light waves reaching at a point produce destructive interference,then the condition of phase difference is:

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