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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/1/2009 7:18:19 PM | I have my own string theory and a ball of string big enough to create my own string-theoretical universe. The problem I'm having right now is trying to fit the strings into a Calabi-Yau manifold I built for my car without clogging the intake. Any help in that regard would be much appreciated.  | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/1/2009 7:37:11 PM | I thought String Theory theorized 11 dimensions, but then again I'm not too up to date on that. As for dimensions curling up on themselves or being compacted to very small scales, I'm not even sure how that works, it seems to defy logic.
There is more than one string theory. I used heterotic as an example because it's my favorite. It's beautiful, complex and simple all at the same time. A heterotic string is a coupling of the bosonic string and the superstring theories. In superstring theory, spacetime has 3+1+6 dimensions. Bosonic string theory was the first string theory developed, and theorizes there are 3+1+22 dimensions. This high dimensionality does not defy logic because of torsion. This would leave only the familiar four dimensions of spacetime visible.
M-Theory is a superstring theory consisting of 11 dimensions, which I believe is the most well-known. | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/1/2009 8:06:53 PM |
I am disappointed in this thread. Naturally, the most stringent requirement of a viable string theory of the Universe is that eventually the theory has to make contact with the 4-dimensional space-time in which we appear to live. This passage from 26 dimensions to 4 dimensions occurs in two steps in heterotic string theory. First of all, 16 of the original 26 dimensions must compact, or curl up on themselves, in a very nice self-consistent way; and then 6 of the remaining 10 dimensions must compact nicely as well in order to get down to our apparent 4-dimensional observed universe.
I don't like string theory nor any derivative of it. In concerning M-theory I don't like that the dimentions "curl" or "fold". Its an interesting idea but it just doesn't fit with me. What doesn't fit? the curl and the fold and the point. I don't like the axiom two points create a line. To me with this axiom its impossible to define true curvature and it can only exist as the expression of an equation. Once a value is found using this axiom an answer is only ever approximate. Furthermore I don't like the idea of infinity it portrays. Infinity upon infinity of possibilities? Membranes and their collisions? To me it just seems like physicists are getting desperate for an explanation. Nevertheless its the closest thing we've got. Personally I think the answer lies beyond the most fundamental description of two points but not inclusive of it. A point is just an isolated change in relationship to other points. If the string theory or any derivative can find and utilize the proof to the reinman's hypothesis then I would consider it likely. But for now to me its just like the aether theory. | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/2/2009 6:18:44 AM | OP
We live in a 4 dimensional world. For instance to describe where you are is done by length width height and time. If I'm in New York city, On the 50th floor of the Empire State building at 1 o'clock in the afternoon EST on Wednesday September 2, 2009, I'm at a point we describe in 3 dimensions (latitude , longitude, height above ground )and at a discrete time.
Now the 5th dimension- that's a Motown band from the 60's- famous song "Age of Aquarius/Let the Sunshine In". After that all the other dimensions are where the socks go in the dryer- one at a time, never in pairs. | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/2/2009 4:16:08 PM |
Op...Ummmm I've often wondered how so many quantum theory majors, can't manage to find the funding for a pay dating site....
This isn't a dating website. You're thinking of www.plentyoffish.com.
In spirit form you would be able to pass through anything.
What is a spirit form? | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/2/2009 7:28:58 PM |
What is a spirit form?
I think it's the form I take after about 30 beers or so. I've been known at that point to fly thru windows and all kindsa doors (usually with a bouncer's assistance). Contrary to popular opinion, it's not as easy as it sounds and usually requires some stitches to stop the bleeding.  | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 9/2/2009 9:03:00 PM | ^I've found that if you can convince the bouncer to act in only three dimensions , the lack of the temporal dimension greatly decreases the force you feel as your head hits the exit door. Actually , your head never goes that far at all....you just sorta find yourself on the other side of the door and voila ! No head trauma !
Honestly though , it's always smarter to think about the fourth dimension and its impact on your cranium PRIOR to drinking too much. | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 10/11/2009 12:03:55 PM | In sci-fi other dimensions are dealt with by beings that are able to "phase" between dimensions. Usually these dimensions are interpreted as universes. To make it more believable those said beings still experience the regular dimensions.
People also like to talk about a 2 dimensional universe because as humans we can imagine it, a piece of paper with no height, however it's important to remember that it's just mathematics and other theories (string theory) come from mathematics which is not bound by the laws of physics.
There are unusual particles in the universe and there are even some parts of the universe where extreme forces cause physics to behave strange, but nothing that introduces extra dimensions.
Other than existing and experiencing it, general relativity is the closest thing we have to understanding the universe.
Look here's an example: If you say to me how does human memory work? I could say imagine a filing cabinet with draws. Whilst the filing cabinet analogy might seem believable, it's not real, it's just a theory, an interpretation, the reality is the human memory is a collection of neurons which we are yet to fully understand. String theory is the same as my example, an attempt to theorise something we don't yet fully understand. Science is ultimately based on proof, theories should not be credited until they are physically proven.
String theory might sound cool, but it's not real until proven. I see stuff like this all the time, people say "scientists have come up with a theory that's compatible with general relativity so it must be true". Einstein would be turning in his grave at such blind ignorance!
As non scientists it's important we only take knowledge from scientists who are able to tell us how they know what they know and back it with proof. | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 10/13/2009 12:10:00 AM |
According to the math, it is likely that other spacial deminsions exist, but are too small to affect us. Of course, this has not been proven yet. Not dont make the mistake of equating the math with pure conjecture. Doesn't math also say that if Matt had 10 apples and he lost 12, he'd have -2 apples? Interpretation is a bugger... If something so simple can be misinterpreted, how do you think those theorists are doing with 11 dimensional computations? Especially with 6 or 7 of which they can't even supposedly comprehend?
By the way, the 4th dimension *can* be imagined. To build it step by step:
0- A point, normal to all directions. (The zero-vector, nothing)
1- An infinite line, containing the point. (Smear the point into a line)
2- An infinite plane, containing the line. (Smear that line into a plane)
3- An infinite cube, containing the plane. (Smear that plane into a cube)
4- An infinite hypercube, containing the cube. (Smear that cube into a hypercube)
Look up the wiki article for hypercube if you're still scratching your head.
As we travel through time, we are seeing a section of the hypercube. We lack the ability to move backwards in time, but be assured the past exists somewhere in the universe, as does the future. | |
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| 1d, 2d, 3d, but how do you think the 4d would be?
Posted: 10/13/2009 5:59:11 PM | They ave 4D movie theaters now
When they guy on the screen spits water at you, not only does the 3D image come at you, but you get hit by water... same if you where watching the rollor coaster ride... the seat shakes and you feel the wind... or if someone points a camera and takes a picture, there is a blinding light in the theater :)
I love those 4D theaters :) there fun, and everyone screams really loud | |
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