In the arrangement shown in figure, slits S1 and S4 are having a variable separation Z. Point O on the screen is at the common perpendicular bisector of S1S2 and S3S4.When Z=λD2d′ the intensity measured at O is I0. The intensity at O when Z=2λDd is

In the arrangement shown in figure, slits S1 and S4 are having a varia

1.	In the arrangement shown in figure, slits S1 and S4 are having a variable separation Z. Point O on the screen is at the common perpendicular bisector of S1S2 and S3S4.When Z=λD2d′ the intensity measured at O is I0. The intensity at O when Z=2λDd is
Answer» In the arrangement shown in figure, slits $S_{1}$ and $S_{4}$ are having a variable separation Z. Point O on the screen is at the common perpendicular bisector of $S_{1} S_{2}$ and $S_{3} S_{4}$ . When $Z = \frac{λ D}{2 d^{'}}$ the intensity measured at O is $I_{0}$ . The intensity at O when $Z = \frac{2 λ D}{d}$ is

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In the arrangement shown in figure, slits S1 and S4 are having a variable separation Z. Point O on the screen is at the common perpendicular bisector of S1S2 and S3S4.When Z=λD2d′ the intensity measured at O is I0. The intensity at O when Z=2λDd is

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