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Planck length




About 10-33 centimeters. The Planck length is the distance less than which quantum fluctuations in the fabric of spacetime would become enormous. It is therefore effectively the smallest meaningful length, or a quantum of distance. The Planck length is the size of a typical string in string theory. See also Planck time.


Related categories

   • SPACE AND TIME
   • PARTICLE PHYSICS
   • COSMOLOGY