Q. When a gold sheet is bombarded by a beam of $\alpha -$particles, only a few of them get deflected, whereas most go straight, undeflected. This is because
A) The force of attraction exerted on $\alpha$- particle by electrons is insufficient
B) The volume of nucleus is smaller than atom
C) The force of repulsion acting on fast moving $\alpha$-particle is very small
D) The neutrons have no effect on$\ \alpha$-particle
Explanation
The correct answer is Option B: The volume of nucleus is smaller than atom.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.