Extra Dimensions

[Aractus]

Maybe because for things like STRING THEORY the LHC is supposed to help them discover and observe the particles predicted to exist by the theory, yet in 400 trillion proton smashes they haven't found them , and you're worried about a couple of missing quarks! Like I said:

[Welsh cake]

I hazard a guess time and space are intertwined and inseparable.

Maybe time is an after-effect, a chain reaction, caused by a continuous big bang event? Perhaps all time really is, is "multiple big bangs" happening this very moment as one universe is instantly destroyed while another is simultaneously created, thereby causing the observable accelerated expanse of the cosmos from a singularity?

After all, time and space are all 'sensory' to us and what we perceive as time, isn't actually "time", I wonder if we demonstrate this by when we die or go into a coma-like state, its why time and space no longer have any meaning.

...Or maybe I'm not thinking about this rationally or sensibly enough?

[Aractus]

...Or maybe I'm not thinking about this rationally or sensibly enough?

This one.

[Tiberius]

Well yes, they currently teach 4-dimensional space-time (ie general relativity). They also teach Newtonian Mechanics. But this direction that is gaining momentum is abandoning time as a dimension. Three physical dimensions, and time is NOT a dimension. So define "generally accepted" because I don't think it is. It may be "de-facto" accepted by those who study other areas of physics, but the debate and the research is ongoing, and it would only be being researched as widely as it is if it was "not" generally accepted.

Right, but I never thought of time as a spacial dimension. I always thought of it as a another type of dimension, unrelated (though linked) to the spacial dimensions. Indeed, in mathematics I've done equations using 24 spacial dimensions, and at no point did we think that mapping points into a 4th dimension meant they were being mapped into "time". It was just another dimension of space, no different to width, height, depth, etc.

In physics, it seems obvious to me that time is a kind of dimension, although it also seems obvious that it is not a spacial one. Objects can move through time, as they can move through space, but unlike moving through space, an object can (seemingly) only move through time in one direction. Spacial dimensions appear to be linked to the time dimension though, as the faster an object travels through space, the slower it travels through time (relative to a stationary observer).

That's all I meant.

[Mark 13:13]

also just because it could exist isn't a proof it does.

What?!
Dinosaurs could exist... do they?
The same goes for unicorns and almost anything else you can come up with, but doesn't exist (as far as we know).

you are making my point but acting like you are refuting it?

I agree with what your saying but we assume the would see abnormailty , but for discussion sake does this mean that when we see an abnormality and cant explain it yet with current scientific thinking within the context of our 3D universe ( 4 if you call time a dimension ) we would be correct to assume its caused by another dimension.

What?!?!?
You wouldn't be correct in that assumption.
First use all the tools at your disposal which use the standard dimensionality... When all these fail, try to use a higher dimensional solution which, when approximated to the standard one will yield the abnormality.... that's what the guys are trying to do with string theory..... but it's so complex they can't do these approximations very well.

It was a rhetorical question which I was hoping led directly to the very answer you have given, so again we are in agreement, glad to have you aboard on this one

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I'm waiting for the bit where he says god is hiding in the other dimensions.

Or something similar.

Not coming because other dimensions if they exist would be part of the Cosmos. But I have a zinger to throw in but not yet as the discussion is interesting and the zinger will probably derail it

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I'm waiting for the bit where he says god is hiding in the other dimensions.

Or something similar.

Or that other dimensions can't be proved to exist, so all of science is a lie created by the devil to pull us away from the one true Cod.
I wonder how he is going to pay his hand exciting isn't it, and it's in 3D?

Nope but I concede I do need everyone to reach a consensus that dimensions can't be proved to exist for now before I can attempt to play my hand.

[FallentoReason]

Nope but I concede I do need everyone to reach a consensus that dimensions can't be proved to exist for now before I can attempt to play my hand.

I'm listening

[Mark 13:13]

I have heard one possibility for the weakness of gravity to be the existence of extra dimensions.

In a scenario that contains a large number of extra dimensions but confines the fundamental forces other than gravity on a 3-brane, only the strength of gravity is diluted by the other dimensions. In this case, the weakness of gravity could literally be due to the large unobserved volume in extra spacetime dimensions.

http://www.learner.org/courses/physics/u...4&secNum=6

Interesting , would that then lead to a conclusion that there can't be infinite dimensions as if there were that would reduce the strength of gravity to an infinitely small force. ( i'm no physicist so apologies if my point seems dumb )

[Anomalocaris]

No. Each force known in physics is thought to be carried by different type of particles collectively called messenger particles. Each type of messenger particle occupy not just a specific number of dimensions, but a specific set of dimensions. So electromagnetic force is carried by photons that occupy precisely the 3 dimensions we see. (interesting huh?, light occupy our three dimensions, hence we see our three dimensions). If gravity occupy our 3 dimensions and then some, those others would be a finite set of specific dimensions, not all other dimensions there might be, nor a random subset of all other dimensions there might be.

So Even if there are a very large number of other dimensions, it would not follow that gravity would therefore be weaker than if there were only a few.

There could be other messenger particles that exists exclusively in dimensions we are currently unequipped to survey.

[Welsh cake]

...Or maybe I'm not thinking about this rationally or sensibly enough?

This one.

Probably right. Useless autistic brain.

[Anomalocaris]

Well yes, they currently teach 4-dimensional space-time (ie general relativity). They also teach Newtonian Mechanics. But this direction that is gaining momentum is abandoning time as a dimension. Three physical dimensions, and time is NOT a dimension. So define "generally accepted" because I don't think it is. It may be "de-facto" accepted by those who study other areas of physics, but the debate and the research is ongoing, and it would only be being researched as widely as it is if it was "not" generally accepted.

There are also physicists who argue not only does time have the characteristics of a dimension, there may be multiple dimensions of time, and our big bang is but the unfurling of just one dimension of time.