# Alpha-particle scattering experiment

The $\alpha$-particles undergo hyperbolic trajectories when they pass nearby the positively charged gold nuclei. Increasing the thickness of the foil increases the probability of an $\alpha$-particle experiencing a close encounter with an Au nucleus resulting in greater deflection angles. Higher energy particles possess a larger component of velocity perpendicular to the foil so I'd say the deflection angle is reduced. Silver has a lower molar mass than gold, the weaker electric field exerts a weaker coulombic force on the $\alpha$-particles resulting in decreased deflection angles.