4 ms·

> Are we even sure that the reasoning behind time-reversal in Newton's laws is solid? Yes, in fact, even QM is time-charge-parity symmetric. Time symmetry in a

by ivalm 4y ago

> Are we even sure that the reasoning behind time-reversal in Newton's laws is solid? Yes, in fact, even QM is time-charge-parity symmetric. Time symmetry in a mechanical system is also necessary for energy conservation.

evanb 4y ago
Time translation symmetry yields energy conservation; time reversal is a discrete symmetry and does not.
- ivalm 4y ago
  Erm yeah you’re obviously right, not sure what I was thinking but can’t edit anymore.