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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 aprt and illuminated by light of wavelength `lambda` passing through an ideal source slit S placed on the line throught `S_(2)` as shown. The distance between the planes of slits and the source slit of 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

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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