4 ms·
Energy conservation follows from Noether's theorem and time translational symmetry. This doesn't hold in general for an arbitrary space-time. In fact, it holds
by pa7x1 5y ago
Energy conservation follows from Noether's theorem and time translational symmetry. This doesn't hold in general for an arbitrary space-time. In fact, it holds for a very specific subset (static spacetimes) of which our universe is not one of them.
- tzs 5y agoRelated: "Energy is Not Conserved" by Sean Carroll [1]. [1] https://www.preposterousuniverse.com/blog/2010/02/22/energy-is-not-conserved/ https://www.preposterousuniverse.com/blog/2010/02/22/energy-...