Summary
Collision theory, through scattering experiments, serves as a powerful tool in uncovering the structure and interactions of atomic and subatomic particles. The Rutherford experiment exemplifies how such experiments can challenge and reshape our understanding of the atom, transitioning from classical models to quantum mechanical descriptions. Key ideas such as scattering cross sections and the use of lab and center-of-mass reference frames bridge classical and quantum territories, highlighting the evolution of experimental physics.