Atomic, molecular, and optical physics electron is treated quantum mechanically. In low speed collisions the approximation fails. Classical Monte-Carlo methods for the dynamics of electrons can be described as semi-classical in that the initial conditions are calculated using a fully quantum treatment, but all further treatment is classical. Atomic, Molecular and Optical physics frequently considers atoms and molecules in isolation. Atomic models will consist of a single nucleus that may be surrounded by one or more bound electrons, whilst molecular models are typically concerned with molecular hydrogen and its molecular hydrogen ion. It is concerned with processes such as ionization, above threshold ionization and excitation
Voyage to the Bottom of the Sea radiation belts had only recently been discovered, and much of what the film says about them is made up for the film. Discoveries since then clearly invalidate what the film says: the Van Allen belts (actually somewhat more radiation-dense portions of the magnetosphere) are made up of sub-atomic particles trapped by the Earth's magnetic field in the vacuum of space and cannot catch fire, as fire requires oxygen, fuel and an ignition source, all of which are insufficient in the Van Allen Belts. Unburned hydrocarbon emissions have never reached concentrations that could support a "skyfire." The film's submarine design is