In this chapter the basic ideas of quantum mechanics are described and then two examples are worked out.
Before embarking on this chapter, do take note of the very sage advice given by Richard Feynman, Nobel-prize winning pioneer of relativistic quantum mechanics:
Do not keep saying to yourself, if you can possibly avoid it, “But how can it be like that?” because you will get “down the drain,” into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that. [Richard P. Feynman (1965) The Character of Physical Law]
And it may be uncertain whether Neils Bohr, Nobel-prize winning pioneer of early quantum mechanics actually said it to Albert Einstein, and if so, exactly what he said, but it may be the best statement about quantum mechanics of all:
Stop telling God what to do.