Discovering how quantum mechanics is predicting the existence of many parallel universes.

Discovering how ideas about the behaviour of light are disrupting classical physics and are introducing quantum mechanics.

Transitioning from the old quantum theory to quantum mechanics with the concept of the wave function.

Delving into the strengths and weaknesses of the Copenhagen Interpretation of quantum mechanics.

Considering exactly what Heisenberg meant by his uncertainty principle, which is often misstated.