Laser Fundamentals Part 1. Laser Fundamentals Part 2. Laser Physics Revision Video. Stimulated emission. Stimulated emission was a theoretical discovery by Einstein [1] within the framework of the old quantum theory, wherein the emission is described in terms of photons that are the quanta of the EM field. Stimulated emission can also be described classically, however, without reference to either photons, or the quantum-mechanics of matter.[2] Overview[edit] Electrons and how they interact with electromagnetic fields are important in our understanding of chemistry and physics. In the classical view, the energy of an electron orbiting an atomic nucleus is larger for orbits further from the nucleus of an atom.
However, quantum mechanical effects force electrons to take on discrete positions in orbitals. Thus, electrons are found in specific energy levels of an atom, two of which are shown below: When an electron absorbs energy either from light (photons) or heat (phonons), it receives that incident quanta of energy. Mathematical model[edit] where h is Planck's constant. . Where . Or See also[edit] Laser fundamentals.