2 ms·
The "source" of gravity is the stress-energy tensor. "Mass" (rest-energy) is a simplification that is useful for approximations and conceptualizations.
by InclinedPlane 8y ago
The "source" of gravity is the stress-energy tensor. "Mass" (rest-energy) is a simplification that is useful for approximations and conceptualizations.
- pdonis 8y ago> "Mass" (rest-energy) is a simplification that is useful for approximations and conceptualizations. Yes, but not in a context where radiation is present, since radiation can have energy but has no rest mass (rest energy).