angström
Angström is a unit of measurement for the wavelength of light, named after the Swedish astronomer and physicist Anders Jonas Angström (1814 to 1874).
The angstrom is a unit of length and has the meter (m) as unit. 1 Angström A is equal to `10^-10` meter, 100 picometer (pm) or 0.1 nanometer (nm).
The unit name angstrom is preferably used in crystallography, spectroscopy, microscopy and optics, but no longer as a unit for optical wavelengths.