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
... 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..
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!
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
12 Comments
AlolanYoda@mander.xyz · 12 pts · 254d
Spending a day doing SEM and seeing fuck all then seeing this meme feels targeted
TheLeadenSea@sh.itjust.works · 9 pts · 254d
EM = electromagnetic? Å = a Swedish letter? What am I missing?
mononomi@feddit.nl · 21 pts · 254d
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
Stitch0815@feddit.org · 2 pts · 254d
Exactly this
This gets worse when talking about cryo EM
wewbull@feddit.uk · 2 pts · 254d
Angstroms hurt my brain. A $10^{-10}$ of a metre, but not a nanometre or a picometre. Just...why?
Hule@lemmy.world · 1 pts · 251d
Edit: also some atoms are about 1 angstrom in size, so it's convenient, I guess..
VocationConfining@piefed.social · 15 pts · 254d
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!
toynbee@lemmy.world · 4 pts · 254d
When do the blondes, brunettes and redheads show up?
pipe01@programming.dev · 2 pts · 254d
That symbol means Armstrongs, but that's all I know
AlolanYoda@mander.xyz · 12 pts · 254d
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
blackbrook@mander.xyz · 7 pts · 254d
I'm taking a moment to appreciate it right now.
SkybreakerEngineer@lemmy.world · 1 pts · 254d
An anthropologist once told me it means Earth