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I did not know that about three polarizers. Fascinating.

As for Schroedinger's Cat, that was a mind-numbing read. I did get one important concept from it though:

"This is a key aspect of the Copenhagen interpretation of quantum physics - it's not just that the scientist doesn't know which state it's in, but it's rather that the physical reality is not determined until the act of measurement takes place. In some unknown way, the very act of observation is what solidifies the situation into one state or another ... until that observation takes place, the physical reality is split between all possibilities."