> Does the universe collapse in a screaming heap of > contradictions? All over the place. It's just that Joe electrical engineer in the street largely seems not to have noticed. Read Zik's fascinating and useful commentary. Parts of this say: ... instantaniety is undefined for events that occur at different places. ... within our current framework it is unclear what faster than light action means. ... As a single particle example take the photon we irradiated from that dipole antenna ... Let's surround.. that transmitting antenna with a sphere of receivers that can absorb the photon. Once the photon has been detected by one of the receivers, all the others are prevented from sensing it. The receivers don't communicate between themselves, but they are 'coupled' all the same - once the photon hit one detector, it will have never went in the others' direction in the first place, although until then its propagation was perfectly symmetric. Leading to: ... This is maddeningly counter intuitive, although perfectly predictable. ... **** The only physicists still bothered by this behaviour today are people who actively try to understand what's going on there. *** And ... But most just got used to it and went on. Good ol quantum mechanics has wrought utter havoc with our conceptions of reality. Fortunately the vast % of people don't know this :-). Not only is QM not understandable but it demands that it be ununderstandable and even goes so far as to demand (Copenhagen flavour, not necessarily all) that even the concept of understanding what happens between emission and detection is meaningless. Our oh so solid reality is built, it seems, on a totally ununderstandable and indeed meaningless foundation. yet QM predicts results with an accuracy that is astounding. It is thoroughly empirical in nature. If we assume that this happens then it must follow that xxx. And they did and it did so they do. And nobody knows why. Or, QM says, ever can. And even the concept of understanding why is meaningless. So, "screaming heap" doesn't even start to cover it. Take Zik's advice - Get used to it ;-) Russell McMahon _____________________________________________________________________________ 'It always puzzles me that so many people can "believe in QM" but have difficulty with the concept of God :-)' -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist