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Physics · 2023 · 1 mark
CBSE 2023 · Region 5 · Set 3 · Q14
In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm. What should be the wavelength of the…
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
(A)
$\displaystyle 420$ nm
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CBSE Class 12 Physics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.