Planck lengths

A form of Planck length — A unit of length, believed to be the scale at which quantum gravity effects become significant, that is defined in terms of the speed of light, the gravitational constant and the reduced Planck's constant, namely: ℓ_P=√(\frac)hbar Gc³≈1.616 252(81)×10⁻³⁵ mbox m

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Meanings

noun
  1. pluralplural of Planck length
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APA

Planck lengths. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Planck%20lengths

MLA

“Planck lengths.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Planck%20lengths. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Planck lengths,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Planck%20lengths.

Source: Planck lengths on Wiktionary, CC BY-SA 4.0.