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Gravity and string theory

  1. Nov 12, 2007 #1
    So after watching the tv show titles "Elegant Universe" narrated by Brian green. and after reading his book with the same name among other books of similar interest, I've had a brain storm. According to M-theory strings are opened ended strings that are connected to the universe at each end as they vibrate. gravity however is the only string, according to m-theory, that is a closed loop string able to traverse our brane of our 3dimensional universe. So i was thinking about relativity and how it says that the solar bodies bend the space time. What i have come to think is that maybe the accumulation of matter in space does not bend space time. What if the concentration of mass/energy affects gravitons and its that bends space and time not the matter. think of it like air pressure on a body in the atmosphere. Sort of explains why close to large bodies gravity is most powerful. Now to throw something into the gears, can we create a dense concentration of energy to create a local gravity field that is independent from earths. in other words can we make a "craft" appear massless in reference to earths gravity for travel purposes.
  2. jcsd
  3. Nov 12, 2007 #2
    what are gravitons??
    what to you mean by a vibrating string???
    what is vibrating on the string???
    why string theory (old one) requires 26 dimensions???
    what are the equations of motion governing a classical string???
    etc etc...

    etc etc...
  4. Nov 12, 2007 #3

    huh. i guess one would have to read about or watch a show about quantum theory in order to know what strings are. i don't know exactly the mathematical equations defining strings or matter. I'm not a physicist, just someone interested in the field. I just through out this idea of my based on what i have learned about string theory and gravity and the universe. So i guess it is possible that what i wrote just might be nothing more than a random collection of familiar words that deal with physics. I thought someone that does know what i am talking about would have some sort of useful input.
  5. Nov 12, 2007 #4
    Not that i know any much physics(im just an amteur like you)
    but i think you learning string theory is going to take a really really long time
    try strating with zweibachs text book its supposed to be for undergrads
    but even that is a tough read.I stopped reading it because i realized i need to have a proper background in other areas of physics like sp rel,part physics ,classical and quantum field theory etc....
  6. Nov 12, 2007 #5


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    Most string texts require about 2 years [working knowledge] of study in calculus, relativity and quantum mechanics to be comprehensible.
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