"The Unified Theory"
.. Albert Einstein couldn't make it....Can we?
THE THEORY OF EVERYTHING
Long time back when it is said science was going in its golden period after the quantum mechanic, uncertainty and general relativity.....their was something which was not so golden to someone....The all time genius...”Albert Einstein”..when other scientists were busy finding new theory and rules he was busy with something that still today is a challenge to humanity...... Albert Einstein believed that As their are various law, governing various bodies...but he felt that their must be something common in all the bodies created after the big bang... He named it...THE UNIFIED THEORY.... What it really meant is something like this...suppose you are preparing for an exam and for this you would have to by heart around 100 formulas...what is the first thing that comes into your mind...WHY CANT THEIR BE A SINGLE FORMULA FOR EVERY POSSIBLE QUESTION AND PROBLEM?? Well to others it maybe a bit silly but to Einstein..it was his dream...he believed that such a formula is possible...
“Ultimately, however one would hope to find a consistent unified theory that would include all these partial theories as approximations. The quest for such a theory is known as “The unification of physics. Einstein spent most of his later time in searching the unified theory but the time was not ripe. Having said this, I still believe there are grounds for cautious optimism that we may now be near the end of the search for the ultimate law of nature. At the moment, we have a number partial theory, we have general relativity, the partial theory of gravity, and partial theories that govern , the strong, and the electromagnetic forces. The last three may be combined in a so called the unified theory. Her are not very satisfactory because they do not include gravity. The main difficulty in finding a theory that unifies gravity with the other forces is that general relativity is a classical theory. That is, it does nit incorporate uncertainty principle of quantum mechanics. On the other hand, the other partial theories depend on quantum mechanics. On the other hand, the other partial theories depend on quantum mechanics. As we have seen, this can produce some remarkable consequences, such as black hole not being black, and the universe being completely self-contained and without boundaries. The trouble is, the uncertainty principle means that even space is filled with pairs of virtual particles and anti-particles. These pairs would have an infinte amount of energy. This means that their gravitational attraction would curve up the universe to an infinitely small size. Rather, similar, seemingly absurd infinties occur in the other quantum theories. However, in these other theories, the infinties can be canceled out by a process called renormalization. This involves adjusting the masses of the particles and the strengths of the forces in the theory by an infinite amount. When you subtract infinity, the answer can be anything we want. This means that the actual values of the masses and the strengths of the forces cannot be predicted from the theory.One therefore has a theory that seems to predict that certain quantities, such as the curvature of space time are really infinite, yet these quantities can be observed and measured to be perfectly finite. In an attempt to overcome this problem, a theory called “super gravity” was suggested in 1976. This theory was really just general relativity with some additional particles. In general relativity, the gravitation force can be thought of as being can be thought of as being carried by a particle of spin 2 called the graviton. The idea was to add certain other new particles of spin 3/2, 1 , ½ and 0. In a sense, all these particles could then be regarded as different aspects off the same “super particles”. The virtual particles/antiparticle pairs of spin ½ and 3/2 would have negative energy.this would tend to cancel out the positive energy of the virtual pairs of particle of spin 0, 1, and 2. In this many of possible infinities would cancel out, but many still remain."
Can their really be a unified theory of everything? Or are we just chasing a mirage? There seem to be possibilities:
1. Their really is a complete unified theory, which we will someday discover if we are smart enough.
2. Their is no ultimate theory of universe, just an infinite sequence of theories that describe the universe more and more accurately.
3. There is no theory of the universe. Events cannot be predicted beyond extent but occur in a random and arbitrary manner.
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