For the sustained interference of light,the n | vedclass

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(A) The essential condition for sustained interference is that the two sources of light must be coherent. Coherent sources are defined as sources that

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Have constant phase difference

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(A) The essential condition for sustained interference is that the two sources of light must be coherent. Coherent sources are defined as sources that emit light waves of the same frequency and maintain a constant phase difference over time. If the phase difference between the two sources changes randomly with time,the interference pattern will shift rapidly,and the time-averaged intensity will be uniform,making the interference pattern invisible to the human eye. Therefore,the correct condition is that the sources must have a constant phase difference.

For the sustained interference of light,the necessary condition is that the two sources should

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