What Is String Theory

String Theory

Think of a guitar range of mountains that has been tuned by reach the make under tension across the guitar. Depending on how the string is plucked and how much tension is in the string, different musical theater notes will be created by the string. These musical notes could be say to be excitation modes of that guitar string under tension.
In a similar manner, in string scheme, the elementary particles we observe in particle accelerators could be thought of as the musical notes or excitation modes of elementary strings.
In string surmise, as in guitar playing, the string must be stretched under tension in order to become excited. However, the strings in string theory are floating in spacetime, they arent tied down to a guitar. Nonetheless, they have tension. The string tension in string theory is denoted by the quantity 1/(2 p a), where a is pronounced alpha primeand is equal to the square of the string length scale.
If string theory is to be a theory of quantum gravity, then the come size of a string should be somewhere go about the length scale of quantum gravity, called the Planck length, which is about 10-33 centimeters, or about a millionth of a billionth of a billionth of a billionth of a centimeter.



Unfortunately, this means that strings are bureau too small to see by current or expected particle physics technology (or financing!!) and so string theorists must devise more clever methods to prove the theory than just looking for little strings in particle experiments.
String theories are classified according to whether or not the strings are required to be unsympathetic loops, and whether or not the particle spectrum embarrasss fermions. In order to include fermions in string theory, there must be a special kind of symmetry called supersymmetry, which means for every boson (particle that directs a force) there is a corresponding fermion (particle that makes up matter). So supersymmetry relates the particles that transmit forces to the particles that...If you want to get a full essay, order it on our website: Orderessay



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