This is an old revision of this page, as edited by Hillman (talk | contribs) at 03:42, 24 May 2005. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
Revision as of 03:42, 24 May 2005 by Hillman (talk | contribs)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)A null dust solution is an exact solution of Einstein's field equation in which the Einstein tensor is null. Physically speaking, this means that it describes either gravitational radiation, or some kind of nongravitational radiation which is described by a relativistic classical field theory (such as electromagnetic radiation), or both. Null dusts include vacuum solutions as a special case.