Re: Open poll on "What changes for special and general relativity?"
- From: Doug Sweetser <dougsweetser@xxxxxxxxx>
- Date: Wed, 21 Nov 2007 16:37:00 +0000 (UTC)
Hello Juan:
Since this is a poll, I guess I should stick to the structure
provided.
1) Spacetime is not 4D.Spacetime is 3D+time, since time does not behave like space. There is
no 5th, 6th, 7th, 8th, 9th, 10th and/or 11th dimension, regardless of
funding.
2) Spacetime is not a continuum.Spacetime is a continuum, and events in spacetime are discrete and
countable (spacetime is not countable, ever).
3) Spacetime is not fundamental just a derived framework.Spacetime needs events, events need spacetime.
4) Lorentz symmetry is an approximation.Global Lorentz symmetry is an approximation to local Lorentz symmetry,
because all important laws are local.
5) Fundamental interactions are not delayed by c. Past light coneThe question confuses me.
causality is an approximation.
6) Gravity is a force like electrodynamics. Thus, geometric GeneralIf true, it would be hard to sell because everything would have to be
Relativity arises like an approximation.
utterly perfect and pristine (from a clod with experience).
7) There is not [sic] dark matter.I agree, there is no dark matter in the Universe, but there are
velocity profiles and distributions that need some new math badly!
8) There is not dark energy.My bet is against this one, but I will not put in all the chips (I
would on 7).
9) Irreversibility is real. Thus Minkowskian view is just approximatedTime cannot have an arrow because it is a scalar, but spacetime can
one.
have a handedness. When Lorentz symmetry goes local, irreversibility
is a handjob.
10) The laws of nature are not deterministic.True because it is the stuff outside the past and future lightcone
that rolls the quantum dice.
11) Time is absolute.The question is poorly formed, since time must be part of spacetime.
12) There exist no fundamental fields on Nature.Disagree. There are fields with really fun and confusing math
properties.
13) General Relativity does not apply at 10^19 GeV. There is notGeneral relativity has been and will remain a great theory, but there
astrophysical singularities or Big Bang.
is a better one to get along with EM and the standard model.
14) E^2 =/= {mc^2}^2 + {pc}^2I would NEVER write it this way, since we observe E, we observe p, and
we calculate m. In curved spacetime, the value of any 4-vector
contraction will change in ways we understand. {mc^2}^2 = E^2 -
{pc}^2 in flat spacetime.
15) Photons are not fundamental particles but quasiparticles likeDisagree.
optical phonons.
16) Universe is chiral.No opinion.
17) Astrophysical black hole candidates are 'preon-strings' stars.No, don't buy strings.
18) Equivalence principle may arise from some other more fundamentalThe equivalence principle is too simple to arise from something else.
principle.
I believe the active, passive and inertial masses are all equivalent.
19) Inflactionary [sic] cosmology will be substituted by some new model.Yes. New math will be fun.
20) Our current bloc-view Universe may be substituted by someWe have one life, and one Universe, even if we don't have a good
multiverse new view.
understanding of either.
21) Your own point. Please enter it with numbering in accord to3D+time is sexier than people give it credit for.
previous messages.
doug
.
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