Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of…
Physics · JEE Advanced · NTA Exams — Optics
Two ideal slits S1 and S2 are at a distance d apart, and illuminated by light of wavelength λ passing through an ideal source slit S placed on the line through S2 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
- \(\sqrt{\frac{3 \lambda D}{2}}\)
- \(\sqrt{\lambda D}\)
- \(\sqrt{\frac{\lambda D}{2}}\)
- \(\sqrt{3 \lambda D}\)
Answer
(C) D 2
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