CBSE 2026 · Region 1 · Set 1 · Q10 · 1 mark

Four independent waves are expressed as

(i)

$\displaystyle \mathrm{y}_{1}=\mathrm{A}_{1} \sin \omega \mathrm{t}$

(ii)

$\displaystyle \mathrm{y}_{2}=\mathrm{A}_{2} \sin 2 \omega \mathrm{t}$

(iii)

$\displaystyle \mathrm{y}_{3}=\mathrm{A}_{3} \cos \omega \mathrm{t}$

(iv)

$\displaystyle \mathrm{y}_{4}=\mathrm{A}_{4} \sin (\omega \mathrm{t}+\pi / 3)$ The interference between two of these waves is possible in

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.