• Imagine an atom with excess energy. Without external action, the atom would, after a period of time, spontaneously emit light, whose properties (. its direction) are random — only the energy is fixed. • This situation changes when the atom is shone with a light wave of the corresponding energy. There is then a higher probability that the atom will also simply copy the remaining properties of the incident wave: It then emits light that is in step with the original and propagates in the same direction | GENERAL PHYSICS III Optics Quantum Physics Chapter XXV Quantum Generators 1. Principle of light amplification 2. Properties of laser beams Quantum generators are light sources that work by a special principle of light amplification Light Amplification by Stimulated Emission of .
