Planck length

English

Named after Max Planck, who defined it.

Planck length (plural Planck lengths)

(physics) A unit of length, believed to be the smallest length that has physical meaning, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely: ${\\displaystyle \\ell _{P}={\\sqrt {\\frac {\\hbar G}{c^{3}}}}\\approx 1.616252(81)\\times 10^{-35}{\\mbox{ meters}}}$

单词	Planck length
释义	Planck length English Etymology Named after Max Planck, who defined it. Noun Planck length (plural Planck lengths) (physics) A unit of length, believed to be the smallest length that has physical meaning, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely: ${\\displaystyle \\ell _{P}={\\sqrt {\\frac {\\hbar G}{c^{3}}}}\\approx 1.616252(81)\\times 10^{-35}{\\mbox{ meters}}}$ See also Planck scale Planck time Planck unit superstring
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