CBSE 2024 · Region 5 · Set 1 · Q16 · 1 mark
Assertion (A) : An alpha particle is moving towards a gold nucleus. The impact parameter is maximum for the scattering angle of $\displaystyle 180^{\circ}$.
Reason (R) : The impact parameter in an alpha particle scattering experiment does not depend upon the atomic number of the target nucleus.
Official answer
From CBSE’s own marking scheme for this paper.
(D)
If both Assertion (A) and Reason (R) are false.
AtomsAlpha-particle Scattering and Rutherford’s Nuclear Model of AtomUnderstandassertion_reasonhard
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CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.