AP EAMCET · PHYSICS · Wave Optics
Two coherent sources \(S_1, S_2\) and a screen are arranged as shown in the figure. If the distance between the two coherent sources is \(n \lambda\) and the distance of the screen from the nearer coherent source is D, then the distance of the first bright fringe on the screen from the point ' \(\mathrm{O}\) ' is
( \(\lambda\) is the wavelength of the light emitted by the coherent sources )
- A \(\sqrt{\frac{D(D+n \lambda)}{n}}\)
- B \(\sqrt{\frac{2 D(D+n \lambda)}{n}}\)
- C \(\sqrt{\frac{3 \mathrm{D}(\mathrm{D}+\mathrm{n} \lambda)}{\mathrm{n}}}\)
- D \(\sqrt{\frac{D(D+n \lambda)}{2 n}}\)
Answer & Solution
Correct Answer
(B) \(\sqrt{\frac{2 D(D+n \lambda)}{n}}\)
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