Saturday, October 6, 2012

Theory of Everything Part II "The String Theory"

String theory has been proposed since the 1960’s as a way to reconcile Quantum Mechanics and General Relativity into such an explanation. However, the
biggest criticism of String Theory is that it isn’t testable.

If we would believe to General Relativity and Quantum Mechanics then everything is nothing but a manifestation of Energy, then this might be the answer to everything. But even the most celebrated scientist and genius itself Albert Einstein does not believe that Quantum Mechanics says it all.

(Isn’t it exciting to hear that even geniuses before are lacking in answers that need to be found? That means our generation has a work to do)


[The Fundamental Forces and Building Blocks]


Our current knowledge about subatomic composition of the universe is summarized in what is known Standard Model of Particle Physics. The mode shows the fundamental blocks of which the world is made and the forces through which these blocks interacts.

Lately, scientists at the CERN research centre near Geneva, Switzerland reported that they found the “God Particle”. It is a subatomic particle key to the formation of stars, planets and eventually life after the Big Bang 13.7 billion years ago.

There are twelve basic building blocks. Six of these are quarks and the other six are leptons. And there are four fundamental forces namely gravity, electromagnetism, and the weak and the strong force. The most familiar of these is the photon, a particle which mediates electromagnetism force – or it is simply light. The gravity is the particle associated with gravity. The strong force is carried by eight particles called gluons. And the last, the weak force is transmitted by particles W+, W-, and Z.
The behavior of these particles is precisely described in the impeccable Standard Model except for one thing – the gravity. For technical reasons, the most familiar force that we encounter in our everyday lives has proven very difficult to describe microscopically.

What is the String Theory?

Ordinary matter is made up of atoms, which turn in just 3 basic components; electrons whirling around nucleus composed of neutrons and protons. Electron is a truly fundamental particle, but neurons and protons are made up of smaller particles called quarks – a quark is elementary.
The essential idea behind the string theory is this: all of fundamental particles of Standard Model are really just different manifestation of one basic object: a string.

Well, we would ordinarily picture an electron, for instance as a point with no internal structure. A point that cannot do anything but move. But in string theory, under extremely powerful “microscope” we would realize that the electron is not really a point, but a tiny loop of string. A string can do something aside from moving – it can oscillates a certain way, then from a distance unable to tell it is a really a string, we can see an electron. But if it oscillates in some other way, well, then we call it a photon or a quark or a …..



Or Everything?



So if the string theory is correct, the entire world is made up of strings!

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