Alpha particle scattering experiment
From 1904 to June 1906, Rutherford did many alpha rays through air of different thickness,
Experiment of mica flakes and metal foil (such as aluminum foil). British physicist W.H. Prague (Bragg, W.H.1862-1942) also conducted such experiments in 1904-1905. They found that in this experiment the alpha ray velocity slowed down and the track was skewed (ie, the phenomenon of scattering occurred). For example, some alpha rays passing through mica are deflected by about 2 ° from their original path, and a small angle scattering occurred. In the winter of 1906, Rutherford also realized that alpha particles can hit when they are above a certain critical speed. Into the atom, the internal structure of the atom can be explored by its scattering and the reaction caused by the electric field in the atom. And he also foresaw the possibility of larger angle scattering.