Central to the mystery of the quantum world are the ramifications of the famed 'double-slit experiment', in which the same electron, it turns out, can be in two places at the same time. Alot of the 'strangeness', mysteriousness etc stems from this experiment, for as Feynman put it in the Character of Physical Law, "any other situation in quantum mechanics...can always be explained by saying, 'You remember the case of the experiment with the two holes? It's the same thing.'" It was only recently that I found out that the real experiment doesn't involve shooting an electron gun (or some such thing) through a wall with two slits towards a detector on the other side, that this is all an analogy for the real experiment, which involves shocking quartz crystals (or something like that). Does anybody have the details of the real experiment, or know where I can look at it?