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Got a letter from GoldBarz asking a question which could be of broad interest.
No reason to restrict discussion to PM. Shd be discussed openly if at all:
Anybody have an opinion?
I say it is possible. Laws have been worked out by physicists for univ. of other dimension.
For example I know the the approach to Quantum Gravity called LQG can be formulated in all dimensions: 3, 4, 5, 6, ...
I guess most physics theories can be formulated in many different dim.
But you can get laws which are ANALOGOUS to the laws we know, but not quite the same and sometimes have some different numbers, like an inverse cube law instead of inverse square. or a 4 instead of a 3, or a pi-squared instead of pi.
Quantum Gravity people sometimes say things like this: when we get an adequate quantum theory of space and time (and the shape of it, which is gravity) then that theory will explain why space has the dimension it does, instead of something else
I don't believe or take seriously stuff that you can't measure or observe or see any detectable consequences of it. So I don't take seriously ideas of "
other universe". for science purpose there is only this.
However one can ask if it could be different.
Could it have different dimension or is this dimension forced by some undiscovered logic. Are other laws possible or is what laws we have forced by some reason. Or is some of what we see just a random accident. Is gravity an accident or did it have to be how it is for some reason?
One can ask that kind question. It makes sense, I think, to ask.
Could be a waste of time, but at least it is not a meaningless thing to ask
No reason to restrict discussion to PM. Shd be discussed openly if at all:
GoldBarz said:Would Our Universe's Physical Laws Operate In A...
A 4D universe?, I know this is somewhat of an unanswerable question but just guess, guess if our physical laws would operate in a 4D universe
Anybody have an opinion?
I say it is possible. Laws have been worked out by physicists for univ. of other dimension.
For example I know the the approach to Quantum Gravity called LQG can be formulated in all dimensions: 3, 4, 5, 6, ...
I guess most physics theories can be formulated in many different dim.
But you can get laws which are ANALOGOUS to the laws we know, but not quite the same and sometimes have some different numbers, like an inverse cube law instead of inverse square. or a 4 instead of a 3, or a pi-squared instead of pi.
Quantum Gravity people sometimes say things like this: when we get an adequate quantum theory of space and time (and the shape of it, which is gravity) then that theory will explain why space has the dimension it does, instead of something else
I don't believe or take seriously stuff that you can't measure or observe or see any detectable consequences of it. So I don't take seriously ideas of "
other universe". for science purpose there is only this.
However one can ask if it could be different.
Could it have different dimension or is this dimension forced by some undiscovered logic. Are other laws possible or is what laws we have forced by some reason. Or is some of what we see just a random accident. Is gravity an accident or did it have to be how it is for some reason?
One can ask that kind question. It makes sense, I think, to ask.
Could be a waste of time, but at least it is not a meaningless thing to ask