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In the arrangement shown, S is a point s...

In the arrangement shown, S is a point source of monochromatic light. S1 and S2 are two slits located sym- metrically with respect to the source with separation between them` d_(1)`. Parallel to this slit plane there are two more slits (S3 and S4) at separation` d_(2)`. These slits are also symmetrically located with respect to S. A screen is at a distance `L_(2)` from this slit plane. How does the intensity on the screen change with y and `d_(1)`?

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The correct Answer is:
`"Intensity" propcos^(2)((pid_(1)d_(2))/(2lambdaL_(1)))cos^(2)((pid_(2)y)/(2lambdaL_(2)))`
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