On Fri, Jul 4, 2025 at 7:27 PM Alan Grayson <[email protected]> wrote:
*> I used to think that one can measure the curvature of the our universe > in order to determine if it is finite or infinite in spatial extent. But > this is impossible. It could be spherically finite but so large that it > will be measured as flat with some very tiny error.* > *With the discovery of Dark Energy in the late 1990s the link between geometry and the fate of the universe is not as clear-cut as it once seemed to be. Even if the universe has a positive curvature it could still be infinite and expand forever, it depends on the total energy density of the universe including the contribution made by Dark Energy, and nobody knows if Dark Energy is constant or changes with time, although very recently there have been hints that it may do so.* *> Aren't we imposing weirdness into QM when it's claimed that a system in > a superposition of states, is simultaneously in all states defining the > superposition? AG* *If you are unsatisfied with just being able to predict the outcome of a quantum experiment and want to have a mental picture of what's actually going on then that picture is, by necessity, going to be weird. If it's not weird then your mental picture would not be consistent with experimental results, and then what's the point of having a mental picture at all? * *John K Clark See what's on my new list at Extropolis <https://groups.google.com/g/extropolis>* -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/CAJPayv1bGAH%3DrKw9bJ5MLBuMA8XzmBXYR2K-54joMDVh5n5Wfg%40mail.gmail.com.
