What is string theory?

Question

i'm reffering to the string theory of the universe.........

Answer 1

String theory is a model of fundamental physics whose building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that are the basis of the Standard Model of particle physics. For this reason, string theories are able to avoid problems associated with the presence of pointlike particles in a physical theory. Studies of string theories have revealed that they require not just strings, but also higher-dimensional objects.

The basic idea is that the fundamental constituents of reality are strings of energy of the Planck length (about 10-35 m) which vibrate at resonant specific frequencies[1]. Another key claim of the theory is that no measurable differences can be detected between strings that wrap around dimensions smaller than themselves and those that move along larger dimensions (i.e., physical processes in a dimension of size R match those in a dimension of size 1/R). Singularities are avoided because the observed consequences of "big crunches" never reach zero size. In fact, should the universe begin a "big crunch" sort of process, string theory dictates that the universe could never be smaller than the size of a string, at which point it would actually begin expanding.

Interest in string theory is driven largely by the hope that it will prove to be a theory of everything. It is a possible solution of the quantum gravity problem, and in addition to gravity it can naturally describe interactions similar to electromagnetism and the other forces of nature. Superstring theories include fermions, the building blocks of matter, and incorporate supersymmetry. It is not yet known whether string theory will be able to describe a universe with the precise collection of forces and matter that is observed, nor how much freedom to choose those details that the theory will allow. String theory as a whole has not yet made falsifiable predictions that would allow it to be experimentally tested, though various special corners of the theory are accessible to planned observations and experiments. Hence critics of string theory occasionally remark that the theory "... is not even wrong," quoting a quip attributed to Wolfgang Pauli.

Work on string theory has led to advances in mathematics, mainly in algebraic geometry. String theory has also led to other theories, supersymmetric gauge theories, which will be tested at the new Large Hadron Collider experiment.

Answer 2

In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings. String theory describes how these strings propagate through space and interact with each other. On distance scales larger than the string scale, a string looks just like an ordinary particle, with its mass, charge, and other properties determined by the vibrational state of the string. In string theory, one of the vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries gravitational force. Thus string theory is a theory of quantum gravity.

Answer 3

String theory is a model of fundamental physics whose building blocks are one-dimensional extended objects (strings) rather than the zero-dimensional points (particles) that are the basis of the Standard Model of particle physics. For this reason, string theories are able to avoid problems associated with the presence of point-like particles in theories of physics, in particular the problem of defining a sensible quantum theory of gravity. Studies of string theories have revealed that they predict not just strings, but also higher-dimensional objects.

Answer 4

String theory says nothing more than concept of whole universe holding the one mathematical description in combine of General and Quantum theory. Strings are the very frequent smallest particle ever in universe. Strings are tiny vibrating oscillation of energy. This smallest scales are of everything that making up you, me, earth as a whole and universe's every part piece of land sign is unique because of this strings. Every string vibrate different pattern and this pattern shows the output result of physical structure. Strings are oscillating like a strings that vibrates and gives different types of musical notes on piano or guitar. Strings are two types; one is closed string and other is opened strings. Close strings are like a loop or hand bands and open strings are like a two ended line. Strings are one dimension and this all strings are in one plane continuous like plate called membrane, shortly called brane. It is not the end of string on luminous stuff and objects, but, even running the fundamental forces of our universe like gravity and electromagnetic force. String theory describes unify of General world and Quantum world. Whereas, general world is all about biggest scales and quantum world is about smallest scales. String theory is simply the theory that first dream by "Albert Einstein" to have unification of everything. Albert Einstein had lasted his 30 years in his life career on doing this unification so, but, Einstein had failed to this problem. String theory was previously known as "Theory of Everything".

Answer 5

http://www.superstringtheory.com/

That's a very complicated question with an equally complicated answer. The above link should answer all your questions. Basically, it's a theory that the universe is created out of different types of invisible threads.

Click the link to learn more.

Answer 6

string therey is a theory that says everything in the univerise is made up of tiny vibrating strings. its also the theory of everything

Answer 7

This'll help. I don't think anyone could explain it to you in just one sentence, but, this explains a lot...
http://www.pbs.org/wgbh/nova/elegant/

Answer 8

It's pure crap, check wikipedia.org

Answer 9

Damn. i thought you were talking about underwear.