Q. Rutherford scattering formula fails for very small scattering angles because
A) The kinetic energy of $\alpha$- particles is larger
B) The gold foil is very thin
C) The full nuclear charge of the target atom is partially screened by its electron
D) All of the above
Explanation
(c)
According to Rutherford
Scattering angle $\propto \frac{1}{\sin^{4}{(\theta/2)}}$
It fails for very small scattering angles because the full nuclear charge of the target atom is partially screened by its electron
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.