CBSE 2023 · Region 5 · Set 3 · Q14 · 1 mark
In an interference experiment, third bright fringe is obtained at a point on the screen with a light of $\displaystyle 700$ nm . What should be the wavelength of the light source in order to obtain the fifth bright fringe at the same point?
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle 420$ nm
Wave OpticsInterference of Light Waves and Young’s ExperimentApplymcqmedium
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CBSE Class 12 Physics past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.