CBSE 2025 · Region 6 · Set 1 · Q15 · 1 mark
Assertion (A) : X-rays are produced when slow moving electrons are stopped by a metal target of high atomic number.
Reason (R): X-rays consist of low-energy photons.
Official answer
From CBSE’s own marking scheme for this paper.
(D)
Both Assertion (A) and Reason (R) are false.
Dual Nature of Radiation and MatterParticle Nature of Light: The PhotonUnderstandassertion_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.