Spontaneous Emission Principle

Spontaneous emission principle

Spontaneous emission, also known as spontaneous emission and quantum transition, is a light-emitting process of atoms. Atoms are excited to transition from a low energy level to a high energy level. Atoms in the high energy level (excited state) are unstable. Without any external influence, they will spontaneously and independently return from the high energy level to the low energy level, while releasing a The photon with energy hν=E2-E1. This process of spontaneously returning photons from an excited state to a lower energy state is called a spontaneous emission process. Radiation process that excites atoms to spontaneously transition to lower energy levels. The electrons in the atom at high energy level E2 generally have to transition to the lower energy level E1, and at the same time emit light radiation with energy E2-E1. If this process is spontaneously carried out without the influence of external factors, it is called spontaneous radiation. It is the luminous mechanism of ordinary light source.