3 ms·
> Mass and energy are exactly the same property Definitely not. Everything couples to the stress-energy tensor, but not every type of particle has rest/invari
by Xcelerate 9y ago
> Mass and energy are exactly the same property
Definitely not. Everything couples to the stress-energy tensor, but not every type of particle has rest/invariant mass. No one really speaks in terms of relativistic mass anymore. (So a photon has energy but no rest mass.)
- psyc 9y agoRelativistic mass is the one that is equivalent to energy, so if no one speaks of it, they'll perpetuate the legacy sloppiness I referred to.