Example: air traffic controller
Search results with tag "Scattering in quantum mechanics"
Scattering in Quantum Mechanics
www.phys.ufl.edumass of ~197, we can safely neglect its recoil. At a density of 19.3 and a thickness of 400 nm, the foil is only about 1600 atoms thick (Rutherford chose gold foil because it can be processed into extremely thin sheets which minimizes multiple scattering).