Re: A Relativity Question

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1 total messages Started by Steve Luzader Fri, 12 May 1995 00:00

#65

Author: Steve Luzader
Date: Fri, 12 May 1995 00:00

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   In response to Eric Smith's question about mass and gravitational
force increasing to infinity, the key word here is "infinity".  In a finite
universe, no real physical quantity (mass, force, energy, ...) can actually
become infinite.  No material object with nonzero rest mass can reach
exactly the speed of light because that would require an infinite amount
of energy (i.e., the mass would become infinite).  To get even a single
electron to exactly the speed of light would require infinitely more
energy than exists in the entire universe, so it's impossible.  (Maybe
I'm easily impressed, but I think that's really amazing.)

Steve Luzader
sluzader@fre.fsu.umd.edu

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