Answer to Question #76781 in Optics for ADP

Question

In YDSE with two identical slits, when upper slit is covered with a transparent sheet of mica, second order minima is observed above the centre of the screen and second order maxima below it. Which of the following can not to possible value of phase difference caused by mica sheet?
1)π/3
2)7π/2
3)10π/3
4)11π/3

Answer 1

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