|MadSci Network: Physics|
I learned of a property of quantum mechanics, "quantum entanglement," where two photons that have split off from a single photon will have properties that are correlated with each other, so even if the photons are separated by light-years, knowing the properties of one immediately reveals the properties of the other, bypassing the restriction that no information can travel faster that the speed of light. But I don't understand how this is essentially different from someone taking two cards, for instance, and puting them in two separate envelopes, mixing the two so that no one know which card is in which envelope, and sending them to each end of the country, then opening one envelope and seeing the card will immediately reveal which card is in the other envelope at the other end of the country. So the correlation of properties of two distant objects need have nothing to do with quantum mechanics. The question is what's the difference between these two cases? Thanks.
Re: Wondering about quantum entanglement...
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