Timeline for Why do we still need to think of gravity as a force?
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| Jul 6, 2013 at 4:50 | comment | added | Abhimanyu Pallavi Sudhir | (contd.). M-theory has no problems But supergravity alone does... So you're right about Kaluza-Klein theory by itselnf having a lot of problems. | |
| Jul 6, 2013 at 4:49 | comment | added | Abhimanyu Pallavi Sudhir | You're answer is fine (+1). But just note that curvature of 5D spacetime leads to gravity in 5D spacetime but either by considering that little extra dimension as a mathematical tool only, or by considering it as physical, but compactified on a circle, this 5D gravity is equivalent to 4D gravity and 4D EM. I.e. In 5D itslef, it is pretty much, just gravity. P.S. Including the Weak and Strong forces in Kaluza-Klein-theory had problems with fermions, so in came supersymmetry! Which made this new Kaluza-Klein theory 11D supergravity, which is the low-energy classical limit of M-theory.... | |
| May 22, 2013 at 17:35 | history | edited | babou | CC BY-SA 3.0 |
added 68 characters in body
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| May 21, 2013 at 23:08 | review | First posts | |||
| May 22, 2013 at 3:41 | |||||
| May 21, 2013 at 22:49 | history | answered | babou | CC BY-SA 3.0 |