EntityQ126904· pop 26· linked from 181 articlespopulation inversionSign in to savestate of a physical system in which more members are in higher, excited energy states than in lower, unexcited statesConnectionscoherenceEntitydye laserEntityAlbert EinsteinPersonphysicsEntityatomEntitylightEntitymoleculeEntityelectronEntityInternational Standard Book NumberEntitymatterEntitythermodynamicsEntityfrequencyEntityheatEntitykelvinEntityopticsEntityphotonEntitylaserEntityrubyEntityPlanck constantEntityBoltzmann constantEntityCategoriesLaser scienceStatistical mechanics