Planck length | has symbol lP | ![2001-09-27 09:33:00.0 2001-09-27 09:33:00.0](facet.gif) |
has value 1.6160 × 10-35 m | ![has URL: http://physics.nist.gov/cgi-bin/cuu/Value?eqplkl, 2001-09-27 09:33:00.0 has URL: http://physics.nist.gov/cgi-bin/cuu/Value?eqplkl, 2001-09-27 09:33:00.0](facet.gif) |
has equation ![](http://physics.nist.gov/cuu/Constants/Value/gif/eqplkl.gif) | ![2001-09-27 09:33:00.0 2001-09-27 09:33:00.0](facet.gif) |
has uncertainty 0.0012 × 10-35 m | ![2001-09-27 09:33:00.0 2001-09-27 09:33:00.0](facet.gif) |
has definition The dimension at which space is predicted to become "foamlike" and at which Einstein's theory is supposed to break down. | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:00.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:00.0](facet.gif) |
has definition The size limit at which normal notions of space-time are supposed to break down. | ![has source: Peat, D. 1988 Superstrings and the Search for a Theory of Everything, Contemporary Books, 2001-09-27 09:33:00.0 has source: Peat, D. 1988 Superstrings and the Search for a Theory of Everything, Contemporary Books, 2001-09-27 09:33:00.0](facet.gif) |
has definition The scale below which quantum fluctuations in the fabric of spacetime would become enormous. The size of a typical string in string theory. | ![has source: Greene, B. 1999 The Elegant Universe, W.W. Norton and Co., New York, 2001-09-27 09:33:00.0 has source: Greene, B. 1999 The Elegant Universe, W.W. Norton and Co., New York, 2001-09-27 09:33:00.0](facet.gif) |
is an instance of universal constant | ![2001-09-27 09:33:00.0 2001-09-27 09:33:00.0](facet.gif) |
is an instance of length | ![2001-09-27 09:33:00.0 2001-09-27 09:33:00.0](facet.gif) |
length | has unit length unit | ![2001-09-27 09:33:26.0 2001-09-27 09:33:26.0](facet.gif) |
fundamental physical constant | has accuracy | ![2001-09-27 09:32:59.0 2001-09-27 09:32:59.0](facet.gif) |