Ångströmien

Ångström is a unit of length named after the Swedish physicist Anders Jonas Ångström. It is most commonly used in chemistry and physics to measure atomic dimensions and the wavelengths of electromagnetic radiation. One ångström is equal to one ten-billionth of a meter, or 10⁻¹⁰ meters. This is equivalent to 0.1 nanometers. The symbol for ångström is Å. While not an official SI unit, it is widely recognized and used in scientific literature. The size of an atom is typically on the order of one ångström. For example, the radius of a hydrogen atom is approximately 0.529 ångströms. The wavelengths of visible light also fall within the range of several hundred ångströms. For instance, red light has a wavelength of about 7000 ångströms, while violet light is around 4000 ångströms. The ångström unit is particularly useful for describing the distances between atoms in molecules and crystals. Its adoption has facilitated precise measurements and comparisons in fields such as spectroscopy and materials science.