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Robert100
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"General Relativity teaches us that Space is expanding." Ok, so as we discussed in a previous thread, a literal interpretation of this is nonsense. "Empty space" does not expand. Rather, objects move apart. Fine, but the universe as a whole is expanding, right? (Of course, we have little idea of the true size of our universe. But at the present moment in galactic history its volume is understood to be increasing, and not just in our observable Hubble volume. Also, the universe almost certainly is expanding at the same rate for many Hubble volumes outside our own.)
But QM teaches us that empty space isn't truly empty. The vacuum energy is very small, but non-zero. So why doesn't the expansion of space mean increase the total amount of vacuum energy? Wouldn't this violate the law of conservation of energy? (Not that this would bother me all that much; the Big Bang itself seems to violate this law.) Or does my postulated increase in vacuum energy come at the expense of losing energy somewhere else?
Any responses would be much appreciated! If this question was already addressed in some previous thread here on physicsforums, then by all means please let me know the appropriate link.
Thanks,
Robert
But QM teaches us that empty space isn't truly empty. The vacuum energy is very small, but non-zero. So why doesn't the expansion of space mean increase the total amount of vacuum energy? Wouldn't this violate the law of conservation of energy? (Not that this would bother me all that much; the Big Bang itself seems to violate this law.) Or does my postulated increase in vacuum energy come at the expense of losing energy somewhere else?
Any responses would be much appreciated! If this question was already addressed in some previous thread here on physicsforums, then by all means please let me know the appropriate link.
Thanks,
Robert