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Ångström unit

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A unit of length equivalent to 0.1 nanometer or 1×10−10 meters, generally used in crystallography and spectroscopy.


Anders Jonas Ångström created a spectrum chart of solar radiation in 1868 where he expressed the wavelength of visible-light spectra in multiples of one ten-millionth of a millimeter (or 0.000,000,1 mm).This unit of length became known as Ångström unit.

However, the nanometer is now more often used as a unit of length while Ångström is no longer as popular as it used to.

Word origin: named after the Swedish physicist, Anders Jonas Ångström.

Symbol: Å

Abbreviation: A
Variant: angstrom unit
Also called: Ångström or angstrom

See also: nanometer, wavelength, Ångström Anders Jonas, Ångström scale