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Talk:Theory of relativity (view source)
Revision as of 02:45, November 19, 2009
, 02:45, November 19, 2009→Comments on Newtonian Mechanics
:::::: The ''rest mass'' of the photon is zero. The photon is not at rest, and does respond to Newtonian gravity. If you think otherwise, then I suggest that you find some sources. [[User:RSchlafly|RSchlafly]] 12:14, 18 November 2009 (EST)
:::::: The ''rest mass'' of the photon is zero. The photon is not at rest, and does respond to Newtonian gravity. If you think otherwise, then I suggest that you find some sources. [[User:RSchlafly|RSchlafly]] 12:14, 18 November 2009 (EST)
::::::: In Newtonian mechanics, "rest mass" is the only mass there is. Newtonian mechanics ''does not predict an increase of gravitational mass with velocity.'' Thus for a photon, the "m" in "F=GMm/rr" is unavoidably zero.
::::::: In Newtonian mechanics, "rest mass" is the only mass there is. Newtonian mechanics ''does not predict an increase of gravitational mass with velocity.'' Thus for a photon, the "m" in "F=GMm/rr" is unavoidably zero.