2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/163786The rise of quantum mechanics is reviewed with special attention to the development between June 1925 and October 1927 when the Copenhagen interpretation was proposed.20 pages, 1 Postscript figure. submitted to Quaderni di Storia della Fisica (Italian Physical Society)History and Philosophy of PhysicsAtomic Physicstext