Trying to be clear on EPR.... Hi - I've been reading this article on quantum physics and I'm getting a little lost.... I don't know anyone I can ask about this stuff - particularly since most of the math is still a few years away for me and I'm an accountant, not a physicist.... if anyone has a minute, would you maybe take a look at this and let me know if I'm anything like getting it? It's the ERP that's got me stumped.... That, or recommend a place to start reading and a course of study to get started on (I'm at McGill University as an adult in, you guessed it, accounting) Thanks very much from a total stranger who probably shouldn't keep reading physics before bed (it's worse than donuts!) -Tammy. From reading: http://library.thinkquest.org/3487/qp.html ERP It's an experiment proposed by Einstein to disprove the weirdness they were seeing in the behaviour of quanta - the whole wave particle deal, and the reason for his quote "God does not play dice". Only, the experiment should work and doesn't. Plenty of people make it sound like it's obvious but it isn't to me... let's see: These particles can be measured in two ways - momentum and location, but not at the same time. Because you have to stop them to measure their location, and so you can't get their momentum because you've stopped them. So, Einstein proposed - and 50 years later they had the tech to test it - take two quanta (they move in pairs), separate them and send them off in different directions. Then, stop one and measure it's location, at the same moment you measure the momentum of the other and you have the info for the one you've stopped. So far I understand it. It should work, it makes sense. But then it didn't work. I think because they behave like waves, which are by nature unmeasurable and if you stop one of two things causing a wave it changes the shape of the wave - like two pillars in a river - Ok, so somehow it didn't work because changing one really does affect the other, and instantaneously, which according to relativity is impossible since it requires the two separated particles to communicate/affect each other faster than the speed of light. :) ?