6 In a YDSE with two identical slits when the upper slit is covered with a thin perfectly transparent sheet of mica the

Question

6 In a YDSE with two identical slits when the upper slit is covered with a thin perfectly transparent sheet of mica the intensity at the centre of screen reduces from its initial value Second order minima is observed to be above this point and second order maxima below it Which of the following cannot be a possible value of phase difference caused by the mica sheet a TC 3 10t 3 c b d TC 2 11 3

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