Picometre

From Wikinfo

Search for "Picometre" on Wikipedia • Wikimedia Commons • Wiktionary • Wikiquote • Wikibooks • Mediawiki • Wikia • Wikitravel • Google (excludes Wikipedia) • Yahoo (excludes Wikipedia) • Creative Commons • WorldCat Amazon • Recent NY Times • Older NY Times.

For criticism see Criticism of Picometre

A picometre (American spelling: picometer, symbol pm) is a unit of length in the metric system, equal to one trillionth (¹/_{1,000,000,000,000}) of a metre, which is the current SI base unit of length. It can be written in scientific notation as 1×10⁻¹² m (engineering notation) or 1 E-12 m (exponential notation) — both meaning 1 m / 1,000,000,000,000.

It equals a millionth of a micrometre (formerly called a micron), and was formerly called micromicron, stigma, or bicron.^[1] The symbol µµ was once used for it.^[2]

It equals a hundredth of an Ångström, an internationally recognized non-SI unit of length.

See also

• Metric system
• Orders of magnitude (length)
• Conversion of units, for comparison with other units of length.

References

1. ^ Elena Deza and Michel Marie Deza (2006). Dictionary of Distances. Elsevier. ISBN 0444520872. 
2. ^ How Many? A Dictionary of Units of Measurement; Russ Rowlett and the University of North Carolina at Chapel Hill; http://www.unc.edu/~rowlett/units/dictB.html

v • d • e SI units of length picometre <<< nanometre <<< micrometre <<< millimetre < centimetre < decimetre < metre < decametre < hectometre < kilometre <<< megametre <<< gigametre

This page uses content from Wikipedia. The original article was at Picometre. The list of authors can be seen in the page history. The text of this Wikinfo article is available under the GNU Free Documentation License.