2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/86202The classical pump-probe scheme for experiments with femtosecond laser is proposed to use for study the inequality of forward and reversed transitions in optics.3 pages LaTeX2e, 2 PS figuresOpticsGeneral PhysicsQuantum PhysicsFemtosecond laser as a tool for experimental study of inequality of forward and reversed processes in opticstext