Could Gigantic Dimensions Redefine Our Understanding of the Universe?

  • Context: Graduate 
  • Thread starter Thread starter oldtobor
  • Start date Start date
  • Tags Tags
    Dimensions
Click For Summary

Discussion Overview

The discussion revolves around the concept of dimensions in the universe, particularly the implications of considering dimensions as potentially large rather than small, as typically proposed in string theory. Participants explore theoretical frameworks, metaphysical implications, and the nature of existence across dimensions.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant suggests that if dimensions were very large, it could lead to new insights into string theory and the nature of the universe, proposing a recursive relationship between size and existence.
  • Another participant humorously questions the feasibility of a "hidden dimension" being trillions of times larger than the universe, implying it wouldn't remain hidden.
  • A reply argues that while dimensions may be hidden, they could still exist in a way that is inaccessible to us, similar to how we cannot perceive certain aspects of string theory's proposed dimensions.
  • Some participants clarify that string theory posits a 10-dimensional universe, with hidden dimensions being small rather than large, and discuss the implications of living in a 4-dimensional slice of this universe.
  • There is a mention of a consensus around 11 dimensions in some models, with a distinction made that some extra dimensions may be large and not curled up.
  • A participant raises the idea that if life exists in higher dimensions, it would be challenging for beings in those dimensions to perceive our 3-dimensional existence, likening it to viewing a complex painting from a distance.

Areas of Agreement / Disagreement

Participants express a range of views on the nature and size of dimensions, with no clear consensus reached. Some agree on the existence of multiple dimensions, while others contest the implications of their sizes and accessibility.

Contextual Notes

Participants reference various interpretations of string theory and the nature of dimensions, highlighting the complexity and uncertainty surrounding these concepts. There are unresolved questions regarding the implications of large versus small dimensions and the accessibility of higher dimensions.

oldtobor
Messages
132
Reaction score
0
From what I read of string theories and such, they always talk about the other dimensions being very small. Has anyone ever thought about making them very large instead to see where the theory leads ? Like a hidden dimension trillions of times the size of the universe etc. Just interesting as another thread talked about the following:


"Thinking about reductionism, it may be that there is no absolute size. The universe may be made in such a way that as we get to smaller and smaller items at a certain point we get to (maybe at 10^-100 cm) back to the universe all over again. Like if we look inside an imaginary microscope and get past a small enough size limit we start to see our whole universe all over again. Then going smaller we see our galaxy, sun, earth, ourselves all the way down again recursively forever. At that given size limit where the smallest item corresponds to the entire universe is where "meatphysical entities" lie, or our mind, or minds or god's mind or mathematical objects lie. That ultimate item doesn't respect mathematics in the sense that the smallest size is equal to the largest, so it lies outside this universe and logic and yet it is the interface between mind and matter. A mathematics where 3 is equal to 3^100 may even be possible to construct.

The point is that if size is infinitely recursive in this sense, then there is no absolute size or measurement, they are only relative to each other within a certain range. The universe would seem to lie outside of any mathematical description or maybe even any logical description. We have no extension and our mind is the ULTIMATE ELEMENTARY PARTICLE AND COMPLETE UNIVERSE AT THE SAME TIME.

One way to imagine a universe with all items having a "constant size" is imagining them decreasing their size in some dimensions of an n-dimensional space and increasing their extension in the hidden dimensions such as their volume is always constant. So the item of size 10^-100 cm will have a length in the hidden dimension of 10^100 cm so as the total volume is always constant. And when the size reaches the "mind as elementary particle" limit it just switches dimensions and starts all over again. I mean a universe and mathematics where the electron (or Planck size item) is equal in size to the universe is conceivable and developable, surely by much smarter mathematicians then myself.

Interesting. Then what would happen if the universe was an INFINITE DIMENSIONAL UNIVERSE ? Then the big bang could be seen as some small items in a set of hidden dimensions reaching their limits and all of a sudden start expanding in our 3 dimensional universe. Or maybe the dimensions are constantly being created to accommodate ever expanding sizes of items. Or maybe at certain size limits new dimensions come into being to keep the volumes constant.

Maybe the extra dimensions introduced in string theories and such should be gigantic dimensions instead of microscopic dimensions. An infinite dimensional universe is even more odd then a universe that has small sizes equal to large sizes. "
 
Physics news on Phys.org
Like a hidden dimension trillions of times the size of the universe etc.
Then it wouldn't be very well hidden!
 
Hurkyl said:
Then it wouldn't be very well hidden!
No?

We can't see outside the visible universe. That's pretty well hidden.

Consider a world that exists entirely within the tiny, curled up 6 dimensions that string theory proposes. Wouldn't they have a lot of difficulty seeing our dimensions?
 
AFAIK, string theory say we live in a 10-dimensional universe. It does not say that we live in a 4-dimensional slice of a 10-dimensional universe. (And it certainly doesn't say that dimensions are like boxes in which we live!)

The 6 hidden dimensions aren't hidden because we're constrained to live in our 4-dimensional slice and simply cannot access them...

The 6 hidden dimensions are hidden because they're so incredibly small that we are currently unable to distinguish displacements along those directions.



I would imagine that a civilization that is on the spatial scale of those 6 hidden dimensions would be living in a rich 9-dimensional space, in which they see 6 of those dimensions curling back upon themselves, and the other three not doing so.

(Ignoring, of course, that in ST it probably doesn't even make sense to talk about anything but a handful of strings on those distance scales)
 
Last edited:
Hurkyl said:
AFAIK, string theory say we live in a 10-dimensional universe. It does not say that we live in a 4-dimensional slice of a 10-dimensional universe. (And it certainly doesn't say that dimensions are like boxes in which we live!)

The 6 hidden dimensions aren't hidden because we're constrained to live in our 4-dimensional slice and simply cannot access them...

The 6 hidden dimensions are hidden because they're so incredibly small that we are currently unable to distinguish displacements along those directions.
Just a quick comment: I think that by now the consensus if on 11 dimensions. And in the "brane" models, some of these extra dimensions *are* large, not curled up. And we perceive 4 dimensions because we are constrained to a 4-dimensional slice (except for gravity which "leaks" out in the other dimensions, explaining why it is much weaker than the other forces).
 
If Life does exist at higher Dimensions wouldn't it be just as difficult for say someone in the 10 dimension trying to see us in the 3rd Dimension as it would be for us to see them?

Where we would have to look into a very small throat to see the 10th Dimension and anyone in the 10th Dimension would need a Special Telescope to see us here in the 3rd since we would be so big when compared. It would be like looking at a Painting that had no seeable end to size and that you could not see the picture until you were far enough away from it otherwise it would just appear as some extremely large smear of particles before them in the 10 Dimension.:bugeye:
 
Last edited:

Similar threads

  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 0 ·
Replies
0
Views
4K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 47 ·
2
Replies
47
Views
4K
  • · Replies 8 ·
Replies
8
Views
2K