Science Fair Project Encyclopedia
Femtometre
Femtometre (American spelling: femtometer, symbol:fm) is an SI measure of length that is equal to 10−15 (femto) of a metre. It is commonly used in measuring the diameter of atomic nuclei. The diameter of an atomic nucleus is up to about 15 fm. Neutrons and protons are about 1 fm in diameter. In the parlance of particle physicists, a femtometre is often called a fermi (same symbol), after the physicist Enrico Fermi.
attometre << femtometre << picometre
See also
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details