• mononomi@feddit.nlEnglish
    22·
    5 days ago

    I think this is referring to electron microscopy, and å is a unit for 10-10 meters. Electron microscopy can be very noisy and it is hard to distinguish objects

    • wewbull@feddit.ukEnglish
      2·
      4 days ago

      Angstroms hurt my brain. A $10^{-10}$ of a metre, but not a nanometre or a picometre. Just…why?

      • Hule@lemmy.worldEnglish
        1·
        1 day ago

        … However, they soon realized that the definition of the metre at the time, based on a material artifact, was not accurate enough for their work. So, around 1907 they defined their own unit of length, which they called “Ångström”, based on the wavelength of a specific spectral line. It was only in 1960, when the metre was redefined in the same way, that the angstrom became again equal to 10^10 metre. Wikipedia

        Edit: also some atoms are about 1 angstrom in size, so it’s convenient, I guess…