CBSE 2026 · Region 3 · Set 3 · Q10 · 1 mark
The ratio of the de Broglie wavelengths associated with the electron revolving in the first and third orbits in hydrogen atom is :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \frac{1}{3}$
AtomsDE Broglie’s Explanation of Bohr’s Second Postulate of QuantisationApplymcqmedium
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CBSE Class 12 Physics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.