Home›Laser science›وارونگی جمعیت🌐فارسیEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ126904· pop 26· linked from 181 articlesوارونگی جمعیتstate of a physical system in which more members are in higher, excited energy states than in lower, unexcited statesAvailable in 26 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةBanglaConnectionscoherenceEntitydye laserEntityCategoriesLaser scienceStatistical mechanics