The distance of closest approach of an α-particle fired towards a nucleus with momentum P is r. What — Atomic Structure Chemistry Question
Question
The distance of closest approach of an α-particle fired towards a nucleus with momentum P is r. What will be the distance of closest approach when the momentum of the α-particle is 2P?
Answer: D
💡 Solution & Explanation
r ∝ 1/KE = 1/(P^2/2m) ∝ 1/P^2. Doubling momentum to 2P decreases r by a factor of 4, giving r/4.
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