What is the idea behind the string theories?

In summary, the physicist started the idea of the string theories by observing the motion of the moon around the Earth. He compared it to the falling of an apple and realized that the universe exists in 7,10, or 11 dimensions. He asks for help finding the mathematics behind the theory.
  • #1
aekanshchumber
91
0
hello,

from sometime in past i was in contact of the string theories. But one thing that clicked in my mind that how does the physicst started the idea of the string theories (all of them) like Newton formulated the law of gravitational force after he observed the motion of the moon around the Earth and compared it to the falling of an apple. what was that point or incident which incouraged the theorist to formulate the string theories and how did they reach at the conclusion that the universe exists in 7,10 or 11 dimensions.
all the help is appreciated also if someone can tell me that what is the mathematics behind it i'd be grateful to.

Thanks
 
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  • #2
Check out this site :
http://www.superstringtheory.com/index.html
 
  • #3
or this one :

http://tena4.vub.ac.be/beyondstringtheory/mtheory.html

regards
marlon
 
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  • #4
Here are a few links to conisder as well


Extra-dimension and String Theory -- http://superstringtheory.com/experm/exper5a.html

Relativity -- http://www.physics.fsu.edu/Courses/Spring98/AST3033/Relativity/GeneralRelativity.htm

Quantum Field Theory -- http://xxx.lanl.gov/abs/hep-th/9702027

Standard Model -- http://superstringtheory.com/experm/exper2a.html

S-matrix -- http://en.wikipedia.org/wiki/S_matrix

Feynman Diagram -- http://www2.slac.stanford.edu/vvc/theory/feynman.html

Feynman Diagram, Animations -- http://www.departments.bucknell.edu/physics/animations/Feynman_diagrams/index.html

Supersymmetry -- http://www.cerncourier.com/main/article/40/10/19

Supersymmetry -- "Physics Beyond the Standard Model", Gordon Kane, Scientific American, Volume 288, Number 6, June 2003, pp 68-75.

Superstrings -- http://www.sukidog.com/jpierre/strings/

Superstrings, the Second Revolution -- http://www.theory.caltech.edu/people/jhs/strings/

M-Theory -- http://www.damtp.cam.ac.uk/user/gr/public/qg_ss.html

Quantum Gravity, Overview -- http://www.utdallas.edu/~loper/research/19980422.pdf
 
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1. What is the basic concept behind string theories?

The basic concept behind string theories is that instead of particles being considered as point-like objects, they are seen as tiny, vibrating strings. These strings have different modes of vibration, which correspond to different particles and their properties.

2. How does string theory attempt to explain the four fundamental forces of nature?

String theory attempts to explain the four fundamental forces of nature (gravity, electromagnetism, strong interaction, and weak interaction) by unifying them into one framework. This is achieved by describing them through the interactions of strings at different energy levels.

3. What is the significance of extra dimensions in string theory?

In string theory, it is proposed that there are more than the three dimensions of space and one dimension of time that we experience in our everyday lives. These extra dimensions play a crucial role in the theory, as they allow for the consistency and mathematical elegance of the theory.

4. How does string theory relate to quantum mechanics and general relativity?

String theory attempts to bridge the gap between quantum mechanics and general relativity, the two most successful theories in physics. It incorporates concepts from both theories and provides a framework that can potentially reconcile their differences and provide a more complete understanding of the universe.

5. Is there any experimental evidence for string theory?

Currently, there is no direct experimental evidence for string theory. However, some predictions of the theory, such as the existence of extra dimensions and the unification of forces, could potentially be tested in future experiments. String theory is still a developing and highly debated area of research in physics.

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