How do you feel about the string theory?

Well, one of the most challenging goals of physics is to propose a theory that would unite the 4 forces of nature - electromagnetism, gravity, strong and weak nuclear forces.

Most of us are very much familiar with the first two terms - electromagnetism and gravity. Strong nuclear forces are responsible for holding the central part of atoms (their nuclei) together, whereas weak nuclear forces are involved in the decay of these nuclei.

Many theories were proposed to unite these four, and one of the most promising of them was the string theory. According to this theory,all particles are actually tiny vibrating strings and each type of vibration corresponds to a different particle.

The theory replaces elementary particles with infinite thin strings to reconcile that apparently incompatible theories that describe gravity and the quantum world. The strings are too tiny to detect using today's technology - but some argue that string theory is worth pursuing whether or not experiments will ever be able to measure it's effects, simply because it seems to be the 'right' solution to many quandaries. What's interesting about string theory is that when it was first proposed, it was first called the string hypothesis, as it was recognised this idea hadn't yet risen to the status of a full fledged theory. At that time, it hypothesised that strings were the fundamental entity inside the atomic nuclei, rather than quarks and gluon. It is a physical hypothesis, and perhaps someday it will become a physically interesting scientific theory. When that day comes, we'll all welcome it proudly into the fold as science. Until then, we can all agree that string theory is interesting for all the possibilities it holds. The scientific process always involves the continued research of more information, the continued refining or outright replacing of hypotheses when the realm of the validity of the theory is exceeded. That's how science has always progressed, whether we've recognised it or not.

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