Videos Mostly examples of time dependent quantum mechanics. Absorption of light by a hydrogen atom in the 1s state. An example of superposition of electronic states. An example of the quantum step potential (high vs. low barrier). Transmission through a finite barrier. Excitation of a ground state vibrational wavefunction for HCl into the 1st excited state. An introduction to quantum dots. An example of stimulated emission: hydrogen pz state to the 1s state. Synthesis of CdSe quantum dots.