Comment on 1.2 Å

TheLeadenSea@sh.itjust.works ⁨3⁩ ⁨weeks⁩ ago

• mononomi@feddit.nl ⁨3⁩ ⁨weeks⁩ 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

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  • wewbull@feddit.uk ⁨3⁩ ⁨weeks⁩ ago

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

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    • Hule@lemmy.world ⁨2⁩ ⁨weeks⁩ 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

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  • Stitch0815@feddit.org ⁨3⁩ ⁨weeks⁩ ago

    Exactly this

    This gets worse when talking about cryo EM

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• VocationConfining@piefed.social ⁨3⁩ ⁨weeks⁩ ago

  Electron Microscopy. Often used to see very small structures at high resolution. So 1.2 Å is 1.2 angstrom, or 0.12 nm.

  Edit: I should add that often at really high magnification, there is a lot of noise, so the joke is that non EM people would just see static. Not too far from the truth. Practice helps seeing the patterns!

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  • toynbee@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    When do the blondes, brunettes and redheads show up?

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• pipe01@programming.dev ⁨3⁩ ⁨weeks⁩ ago

  That symbol means Armstrongs, but that’s all I know

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  • AlolanYoda@mander.xyz ⁨3⁩ ⁨weeks⁩ ago

    I don’t know if you’re memeing but for anyone else, it’s angstrom (Ångström originally, but the Swedish spelling is not needed or appreciated anymore >:( ), or 0.1 nm, 10^-10 m

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    • blackbrook@mander.xyz ⁨3⁩ ⁨weeks⁩ ago

      I’m taking a moment to appreciate it right now.

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  • SkybreakerEngineer@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Image

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