| Angstrom |
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DEFINITION : 1 ångström (Å) = 10–10 Metre s = 0.1 Nm = 100 Pm For comparison, the average Diameter of an Atom , calculated from its Empirical Radius , ranges from approximately 0.5 Å for Hydrogen (the smallest element) to 3.8 Å for Uranium (one of the largest naturally occurring elements on Earth ). ORIGIN The ångström is named after the Swedish Physicist Anders Jonas Ångström (1814–1874), one of the founders of Spectroscopy . Besides Astrophysics , Ångström was also a student of Heat transfer, Terrestrial Magnetism , and the Aurora Borealis , which was so prominent for him in his northern skies. He created a spectrum chart of Solar Radiation that expresses the Length of Electromagnetic Radiation in the Electromagnetic Spectrum on the order of multiples of one ten-millionth of a Millimeter , or 1 Meter s. This unit of Length became known as the ångström, Å. REPRESENTATION IN UNICODE Unicode includes the "angstrom sign" at U+212B (which looks like Å in a Web Browser ). However, the "angstrom sign" is Canonically Decomposed into U+00C5 (Å), thereby seen as a (preexisting) encoding mistake, and it is better to use U+00C5 (Å) directly. SEE ALSO |