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s it true or wrong to say that “A double-slit interference pattern is caused by differences in the path lengths traveled by the light emanating from each slit”? Either yes or no explain it.”
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It is correct, although the proponents of some interpretations may say that it is not “the path of the light emanating from each slit” but the path of some pilot wave” or something similar.
Actually in many interferometer experiments the results (positive and destructive interference in different degrees) are sought or manipulated precisely by playing with the relative lengths of each path from source to detector(s).