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Thread: I dont understand something about .........

  1. #1 I dont understand something about ......... 
    Forum Freshman
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    ...string theory and branes. I watched the elegant universe thing on youtube and found it very interesting. The only thing I dont understand is about how strings turn into branes. They said that because there is other dimensions involved with strings they can turn into branes. And in fact our universe could be sitting on top of a brane. Heres the thing i dont get, strings are sooo small we will never be able to see them, if a string was to become a brane that was as big as the universe surely we would be able to see the string as it has got bigger. The only possibility I could see a solution in this is that the string is in another dimension so we can't see it or everything around us , the whole universe, is a string.


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    Forum Sophomore DarcgreY's Avatar
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    From what little I understand of string theory there isn't a size limitation on strings. Under most conditions in the universe strings would be 10^-33cm in length, but strings formed in high energy environments(like the BB) could be much larger. It's the amount of energy that created the string that determines the size. That's what I get out of the theory anyway.


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    Forum Professor river_rat's Avatar
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    Lol, no one understands strings and banes!
    As is often the case with technical subjects we are presented with an unfortunate choice: an explanation that is accurate but incomprehensible, or comprehensible but wrong.
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    Forum Junior Bettina's Avatar
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    Slippy, try reading this. It may help you understand although I have a hard time understanding them myself.

    https://mywebspace.wisc.edu/bjunderw...PaperGuide.doc

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    Emotionally based life form. The Fword will get you on my ignore list.
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  6. #5  
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    Just as long as there ain't any viruses, ok?

    PS. It's not strange you have a hard time gripping it, since it is self contradicting ie. for two vectors to form energy, they must have opposit direction and they must also have a vector that has equal momentum as before, and since all coordinates have the property of direction and (if thickness in density causing n-value) still has the max speed just as a photon becoming mass and hence, no matter what direction mass has along its vector, this coordinate becomes infinitely thin forbidding any more brains along this coordinate, unless they belong to the same brain as we do. The only possibillity for other branes or universes is that momentum has a slightly variable direction of vektor which it clearly has, and this would cause variable views of the same n-dimensional universe that is vektordependent. In other words, everything belongs to our universe, but we cannot see every view of it.
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  7. #6  
    Forum Ph.D.
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    A concept I've always found interesting is that during inflation, microscopic strings grew to enormous lengths into what we today call cosmic strings. As far as I know there's no observational backing to the hypothesis but it's damn fascinating.
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