3 ms·
> in short, conservation of momentum cannot be violated Why?
by outworlder 10y ago
> in short, conservation of momentum cannot be violated
Why?
- piannucci 10y agoSpeaking somewhat loosely, the relationship between the local state of spacetime and its energy, the Lagrangian density, does not seem to depend on where you are or when you are. Emmy Noether gave us a straightforward proof that each such "differentiable symmetry" (in this case, translation invariance) implies that the state of spacetime maintains a corresponding "conserved current" (in this case, momentum and energy density).