Re: What if gravity isn't a force, just an illusion of expanding spacetime's momentum?
- From: cfk <ckurasek@xxxxxxxxx>
- Date: Sat, 21 Jul 2007 04:16:30 -0000
On Jul 20, 9:21 pm, "Bill Hobba" <rubb...@xxxxxxxx> wrote:
"cfk" <ckura...@xxxxxxxxx> wrote in message
news:1184962721.776315.270760@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Could it be possible that gravity isn't a force per se, rather
spacetime expands at a rate proportional to the mass occupying it and
the distance from the mass (like an expanding light cone, only made
from the spacetime 'fabric'), and the 'force' of gravity is really
just an illusion that's an artifact of the expansion (like centrifugal
force isn't really an independent force)?
How does the expansion generate the force? If everything expands what
presses against what?
Rest of misconceptions snipped.
Bill
If one accepts that spacetime is indeed a fabric that is expanding and
consequently affects matter and energy, then inflation would be
affecting everything, including us. If spacetime was expanding at
different rates (e.g. in proportion to the mass occupying it), then
the effects would not be uniform. We know that all galaxies are
moving away from us and at an accelerating rate proportional to it's
distance from us, so from our relativistic frame, inflation is not
having uniform effects.
So what if the rate of inflation of the spacetime occupied by the
earth was 9.8 m/s^2 at the crust, while the inflation of the spacetime
occupied by the average human was something negligible (e.g. 9.8 x
10^-10 m/s^2). Due to the greatly disparate rates and 'force' of the
planet's expansion, the earth's spacetime inflation would overwhelm
the average human's spacetime inflation, essentially becoming the
floor of the elevator that is uniformly accelerating into the feet of
the rider. Taking this assumption further would imply that by
remaining stationary for a long enough period of time, any object
would begin to levitate. This can be addressed by assuming the
disparity in the force of the two expansions (i.e. the human's vs. the
earth's), ends up folding over the lesser expansion. A similar
analogy would be tectonic plates - if a massive plate is moving at a
relatively high velocity and collides with a stationary plate that is
much thinner and less massive, the thinner plate will buckle, either
being forced underneath the heavier plate, or forced upwards (e.g.
creating a mountain range). So the implication would be the spacetime
inflating under the 'weaker' force would buckle / fold (potentially
into another dimension?).
The interactions between two bodies of similar mass would be
determined by the distance between the two centers of mass - the
further away from the center, the exponentially slower the expansion
propagates (just as the intensity of light from a light source). If
two equally massive bodies are close enough that the interaction
between the two rates of inflation maintains enough energy, then both
'plates' end up buckling / folding, with the 'fold' somehow pulling
the two bodies together, essentially bringing the bodies together at a
rate proportional to the decreasing distance between them.
And to explain the inflationary behavior of distance galaxies, one
could assume that if two regions of expanding spacetime interact at
distances sufficiently beyond the event horizon at which buckling /
folding would occur, those two 'fronts' of spacetime would meet and
simply push against each other, explaining why the universe can be
expanding at accelerating rates, without having to take a leap of
faith that there's some 'dark energy' out there counteracting the
traditional concept of gravity.
An overall analogy would be taking two pieces of cardboard coming out
of cardboard-making machines that are levitating with zero lateral
friction holding them in place. If both machines produce cardboard,
when the two fronts of cardboard meet, the machines will start moving
away from each other (giving us inflation that accounts for gravity
and does not require dark energy).
If the machines are making cardboard at an extremely high rate, the
meeting fronts of cardboard may either buckle or displace each other,
again behaving like tectonic plates, only somehow the folding /
buckling material ends up moving faster than the rate of either
independent rate of cardboard production, 'pulling' the two machines
together. (Obviously there needs to be an explanation for why once the
cardboard displaces from the horizontal plane it starts moving faster
than the rate at which it's respective machine is making it.)
If one machine is making paper (a human) and one is making cardboard
(earth), then when the cardboard and paper meet, the paper will not
provide much resistance, such that the cardboard will easily reach the
paper-making machine and start pushing on it (and nobody would claim
the cardboard was attracting the paper-making machine via any force).
I realize this is still not the most comprehensible explanation of the
idea, so let me know if this still doesn't make sense.
.
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