If Rutherford had used β⁻ particles instead of α-particles in his gold-leaf experiment, which observation from the original experiment would not occur?
Correct answer: A. Large-angle back-scattering of particles
- A. Large-angle back-scattering of particles
- B. Majority of particles passing undeflected through the foil
- C. Very few particles getting absorbed
- D. Wave nature of electrons
Explanation
Rutherford's key observation was the back-scattering of a few massive α-particles, which revealed a small, dense, positive nucleus. Lightweight β-particles (electrons), being attracted to the nucleus and having very little momentum, would not rebound at large angles in the same way.
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