Physics – General Physics
Scientific paper
2011-01-16
Physics
General Physics
14 pages
Scientific paper
Electromagnetic field (EMF) of spontaneous emission (SE) of laser excited two-level nonrelativistic atom is calculated in explicit form by a simple method of atom quantum electrodynamics. EMF of SE is calculated also for three types of polyatomic light sources excited by laser. It is shown that light radiated by such sources can be coherent, which conforms to recent experiments on SE of laser excited atoms. Small sources of SE can be superradiant. Thus SE is shown not to be a random event itself. Random properties of observable natural light are described as a result of thermal excitation randomness. EMF of SE is described by complex functions but not real ones.
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