AIIMS 2019 Physics Rutherford Scattering Assertion Reason Question
Assertion: For the scattering of α-particles at large angles, only the nucleus of the atom is responsible. Reason: Nucleus is very heavy in comparison to electrons.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Correct Answer
Detailed Explanation
The assertion is true because the scattering of α-particles at large angles is primarily influenced by the nucleus due to its positive charge and significant mass compared to electrons, which have negligible mass and charge in this context. The reason is also true, as the nucleus's heavy mass allows it to exert a stronger influence on the trajectory of the α-particles. Since the reason directly explains why the nucleus is responsible for the scattering, option A is correct. Options B and C are incorrect because they either misinterpret the relationship between the assertion and reason or incorrectly state that one of them is false. Option D is incorrect as both statements are indeed true.
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