CBSE 2025 · Region 5 · Set 1 · Q11 · 1 mark
Two coherent light waves, each having amplitude 'a', superpose to produce an interference pattern on a screen. The intensity of light as seen on the screen varies between :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 0$ and $\displaystyle 4 \mathrm{a}^{2}$
Wave OpticsInterference of Light Waves and Young’s ExperimentApplymcqeasy
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.