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Planck LengthThe Planck length is a unit of length equal to 1.6 x 10^{35} meters. The Planck length LP is defined by taking the constants of nature and combining them in such a way that their units combine to give a length. The combination that works is:^{[1]} L_{P} = (hG/2πc^{3})^{1/2} Significance in PhysicsPhysicists have long suspected that quantum gravity will become important for understanding physics at about the scale of the Planck length. The reason is very simple: any calculation that predicts a length using only the constants from the equationc, G and hmust give the Planck length.^{[2]} Sources
