Previous Page...   Printer Version Science Constants - Ångström Symbol: Å Value: 10-10 m Category: - Electromagnetic Constants Description: The ångström is an old unit used for measuring the wavelength of electromagnetic radiation including visible light and X-rays. The unit has since been superseded by the nanometre but is still used in crystallography.   The unit was named after the Swedish physicist A J Ångström (1814-74).   [ H O M E ] [ S C I E N C E ] [ M A T H S ] [ A S T R O N O M Y ] [ Download ] [ Shop ] [ Contact ] [ About ]