Introduction to M-theory: Difference between revisions

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However, for string theory to be mathematically consistent, the strings must be in a universe of ten [[dimension]]s. This contradicts the experience that our real universe has four dimensions: three space dimensions (height, width, and length) and one time dimension. To "save" their theory, string theorists therefore added the explanation that the additional six dimensions exist but cannot be detected directly; this was explained by sophisticated mathematical objects called [[Calabi–Yau manifold]]s. The number of dimensions was later increased to 11 based on various interpretations of the 10-dimensional theory that led to five partial theories, as described below. [[Supergravity]] theory also played a significant part in establishing the necessity of the 11th dimension.

"Explanation", you got 3 dimensions for a human being (high, width and length) you stand on earth and spin with the earth... the earth has also got 3 dimensions and spins around the sun; the solar system has also got 3 dimensions and spins around the galactic core, as well the galaxy has 3 dimensions for itself, but creating also time getting away "the center of the Big Bang" creating time for the core. So for a human standing on earth it makes 9 dimensions creating gravity plus 1 time in his space...

These "strings" vibrate in multiple dimensions and, depending on how they vibrate, they might be seen in three-dimensional space as matter, light or gravity. It is the vibration of the string that determines whether it appears to be matter or energy, and every form of matter or energy is the result of the vibration of strings.