## Planck lengthAbout 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 | |||||

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