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Two ideal slits S(1) and S(2) are at a d...

Two ideal slits `S_(1)` and `S_(2)` are at a distance `d` apart, and illuninated by light of wavelength `lambda` passing through an ideal source slit `S` placed on the line through `S_(2)` as shown. The distance between the planes of slits and the source slit is `D.A` screen is held at a distance `D` from the plane of the slits. The minimum value of `d` for which there is darkness at `O` is `(dlt lt D)`

A

`sqrt((3lambdaD)/(2))`

B

`sqrt(lambdaD)`

C

`sqrt((lambdaD)/(2))`

D

`sqrt(3lambdaD)`

Text Solution

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The correct Answer is:
C
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ERRORLESS -WAVE OPTICS-SET
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