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Re: Gravity as Actual Field versus Geometry
Posted:
Feb 27, 2012 4:28 AM
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On Feb 26, 4:36 am, Joe Wisherman <joewisher...@yahoo.com> wrote:
> If one won't use General Relativity. What makes light bend around the
> sun since light doesn't have mass.
There's the unified field theory assumption that all luxons are
mixtures of the current photon (or W/Z boson via electroweak theory)
and gluon, and have a nonzero (but very very small) probability of
being say a massive Z instead of a visible photon. That gives every
photon something halfway between virtual and real mass; real enough to
gravitate but virtual enough to fix their velocity at c.
> Or how would light bend in flat
> spacetime if you take the superstring theory approach where there is
> really no curvature and it is a spin-2 field on flat spacetime which
> is what strings do.
GR is nonflat warped spacetime. Flat spacetime could be warped by
allowing only in-plane (so to speak) oscillations of string fragments.
Don't ask me what anchors the points where strings meet.
With real strings, the ground state might be no oscillations, with
the string presumably at some Planck minimum distance apart. Any
oscillation will shorten the string, drawing its endpoints nearer each
other. If gravitons can be represented by such long-range strings or
coherent masses of strings, Robert is your father's brother.
Mark L. Fergerson
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