Answer
In a spontaneous emission, electrons jump from a higher-energy state to a lower-energy state without any external stimulation, and a photon is released in the process. Stimulated emission, on the other hand, is an induced process. The electron in the higher-energy orbit can jump to a lower-energy orbit when a photon of energy that equals the difference of the energy between the two orbits is introduced.Once atoms are prepared with enough electrons in the higher-energy state, stimulating photons triggers them to jump down to the lower-energy state. The emitted photons trigger the rest of the electrons and eventually all the electrons will be in the lower-energy state.
Work Step by Step
In a spontaneous emission, electrons jump from a higher-energy state to a lower-energy state without any external stimulation, and a photon is released in the process. Stimulated emission, on the other hand, is an induced process. The electron in the higher-energy orbit can jump to a lower-energy orbit when a photon of energy that equals the difference of the energy between the two orbits is introduced. Once atoms are prepared with enough electrons in the higher-energy state, stimulating photons triggers them to jump down to the lower-energy state. The emitted photons trigger the rest of the electrons and eventually all the electrons will be in the lower-energy state.
