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Re: Increasing Mass of Particles



At 17:32 2/23/98 -0700, Dan Schroeder wrote:
....
The source of spacetime curvature (or more loosely, of gravity)
in general relativity is the energy-momentum tensor...

This is to be contrasted with electromagnetism, where the source
is the current density four-vector, whose time component is the
charge density and whose space components are the current densities.

-dan

Feel free to correct my naive response - but in less rarified contexts,
a current is a time-related value, and charge is time invariant?

Whatcott