ångström
Sign in to saveThe angstrom (; ) is a unit of length equal to m; that is, one ten-billionth of a metre, a hundred-millionth of a centimetre, 0.1 nanometre, or 100 picometres. The unit is named after the Swedish physicist Anders Jonas Ångström (1814–1874). It was originally spelled with Swedish letters, as Ångström and later as ångström (). The latter spelling is still listed in some dictionaries, but is now rare in English texts. Some popular US dictionaries list only the spelling angstrom.
AI overview
An ångström is an extremely tiny unit of measurement equal to one ten-billionth of a metre, used to describe the sizes of atoms and the wavelengths of light. The unit was named after Swedish physicist Anders Jonas Ångström and remains useful in physics and chemistry for measuring things too small to see with the naked eye.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Unit.name
- angstrom
- Unit.image
- Hydrogen atom.svg
- Unit.caption
- The width of a hydrogen atom is about 1.1 angstroms; the width of a proton (in black) is angstroms.
- Unit.standard
- Non-SI metric unit
- Unit.quantity
- Length
- Unit.symbol
- Å
- Unit.namedafter
- Anders Jonas Ångström
- Unit.units1
- SI Units
- Unit.inunits1
- =
- Unit.units2
- CGS Units
- Unit.units3
- Imperial units
- Unit.units4
- Planck units
via Wikipedia infobox
Article
10 sectionsContents
- History
- Early connection to the metre
- Cadmium line definition
- Redefinition in terms of the metre
- Angstrom star
- Current status
- Symbol
- See also
- References
- External links
The angstrom (; ) is a unit of length equal to m; that is, one ten-billionth of a metre, a hundred-millionth of a centimetre, 0.1 nanometre, or 100 picometres. The unit is named after the Swedish physicist Anders Jonas Ångström (1814–1874). It was originally spelled with Swedish letters, as Ångström and later as ångström (). The latter spelling is still listed in some dictionaries, but is now rare in English texts. Some popular US dictionaries list only the spelling angstrom.
The unit's symbol is Å, which is a letter of the Swedish alphabet, regardless of how the unit is spelled. However, "A" or "A.U." may be used in less formal contexts or typographically limited media.