Laser – a photon with equal energy to the recombination energy can cause recombination by stimulated emission, which generates another photon of the same frequency travelling in the same direction and polarization and phase as the first photon.
Laser – a photon with equal energy to the recombination energy can cause recombination by stimulated emission, which generates another photon of the same frequency travelling in the same direction and polarization and phase as the first photon.