During the preface, this sequence of topics is recommended to follow the historical evolution of quantum theory: Planck’s radiation law, Einstein-Debye theory of specific heats, Bohr atom, de Broglie’s matter waves, Compton effect, Franck-Hertz experiment, Davisson-Germer-Thompson experiment.
Chapter 1.1: Stern-Gerlach Experiment, Sequential Stern-Gerlach Experiment