Mach's Principle: Right or Wrong?

[Jonathan Scott]

Is there any truth to the rumor that general relativity incorrectly handles orbital angular momentum?

Einstein-Cartan theory is supposed to fix a theoretical problem with spin angular momentum (not orbital angular momentum).

 

[Phrak]

Einstein-Cartan theory is supposed to fix a theoretical problem with spin angular momentum (not orbital angular momentum).

That's what I understand, Jonathan. Though some think corrections to orbital angular momentum are implied from corrections to spin angular momentum.

 

[Al68]

We don't have any empty universes to experiment with. Without one, we can apply the theory we have, or make up a new one. Any other suggestions?

Not for practical experiments, no. But we're in the realm of theoretical physics here, not empirical physics.

Obviously, speculating about an empty universe is very relevant to a discussion of Mach's principle, which is the subject of this thread.

If I knew of a way to empirically prove or disprove Mach's Principle, I wouldn't post it here and let someone else get the Nobel Prize for it, now would I?