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Jonnyb42
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If wormholes connect two areas in spacetime, wouldn't that require 5 dimensions? (an extra dimension past 4d spacetime.)
Bill_K said:It may look like extra dimensions are needed to embed that world in some higher dimensional Euclidean space. But since we are confined to our four dimensions, there is no way to detect anything outside that, and it's perfectly consistent to do physics without assuming that anything else exists.
Ok well, I find that to be crazy.you do not need extra dimensions to curve spacetime.
jarednjames said:A simply analogy, if I draw to points on a piece of paper and then fold it in half so they touch, have I used an extra dimension? Of course not.
Jonnyb42 said:If there didn't exist a 3rd dimension you would not be able to fold them and connect the points.
jarednjames said:But it does exist, it is already there. There's no need to invoke another dimension.
Jonnyb42 said:But your example is connecting two points in 2d spacetime isn't it, there is not 3rd dimension supposedly, yet you used it to connect the two points.
jarednjames said:The world is 3D last time I checked. The third dimension is there, even if you're not immediately using it (well, actually you are using it because you can't have only 2D in reality).
Jonnyb42 said:your analogy doesn't have the same dimensions as reality, if it did why would u call it an analogy?
jarednjames said:Of course it does. To be an analogy it has to be similar, that's all.
http://dictionary.reference.com/browse/analogy
Jonnyb42 said:dude, 2d spacetime connecting 2 points through 3rd dimension.
There isn't a 3rd dimension in 2d spacetime...
Are you saying there is 5th dimension in our 4d spacetime?
I'm asking if that's the case.
Jonnyb42 said:dude, 2d spacetime connecting 2 points through 3rd dimension.
There isn't a 3rd dimension in 2d spacetime...
Are you saying there is 5th dimension in our 4d spacetime?
I'm asking if that's the case.
ryan_m_b said:It's not hard to understand! He's using a 3d piece of paper and folding it to put two distant coordinates next to each other, no extra dimension there
EDIT: He=Jaredandjames
[Note: The piece of paper in what follows is to be thought of a two-dimensional surface, i.e. no thickness]jarednjames said:I thought wormholes folded space to connect two points.
A simply analogy, if I draw to points on a piece of paper and then fold it in half so they touch, have I used an extra dimension? Of course not.
ryan_m_b said:EDIT: He=Jaredandjames
Nabeshin said:[Note: The piece of paper in what follows is to be thought of a two-dimensional surface, i.e. no thickness]
This is irrelevant, jared. If you want to make your analogy correct, you need to think of it differently. The curvature induced on the piece of paper is a property of the piece of paper and the piece of paper alone. It can be described completely adequately by referring only two two-dimensional coordinates labeled on the paper.
Specifically, you do NOT need a 3rd coordinate to describe the curvature. So while it is true that in every day life to impose this curvature we bend the paper through the third dimension, one does not need to extend this to the universe (as OP would like). That is, the curvature of our universe can be described by referring only to our four dimensions, without any need for invoking a fifth.
The act of "visualizing" a surface necessarily involves an extra dimension. But that means absolutely nothing about the existence of such extra dimensions, only that if we wanted to visualize them, we would need them.
No, wormholes do not necessarily require additional dimensions. While some theories suggest that wormholes might exist in higher dimensions, others propose that they could exist in the same four dimensions of spacetime as we currently understand it.
Wormholes are currently purely theoretical and have not been observed or proven to exist. However, some scientists believe they are possible based on mathematical models and theories of general relativity.
While it is an intriguing concept, the idea of using wormholes to travel through time is purely speculative and has not been proven to be possible. Additionally, the concept of time travel is still a subject of debate and has not been scientifically confirmed.
As mentioned before, wormholes are currently only theoretical and have not been observed. However, scientists use mathematical models and theories to propose their existence and continue to study and research the possibility of their existence.
While some theories suggest that wormholes could allow for faster-than-light travel, the concept is still highly speculative and has not been proven to be possible. Additionally, the laws of physics currently do not support the idea of faster-than-light travel.