CBSE 2025 · Region 7 · Set 1 · Q15 · 1 mark
Assertion (A) : EM waves do not require a medium for their propagation. Reason $\displaystyle (R)$ : EM waves are transverse waves.
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Electromagnetic WavesUnderstandassertion_reasonmedium
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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.