Stitch0815

1.2 Å

https://feddit.org/post/22767922

Dec 10 at 12:06pmWeb
Show threadTheLeadenSeaDec 10
EM = electromagnetic? Å = a Swedish letter? What am I missing?
Show threadmononomiDec 10
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
Show threadStitch0815Dec 10

Exactly this

This gets worse when talking about cryo EM

Show threadwewbullDec 11
Angstroms hurt my brain. A $10^{-10}$ of a metre, but not a nanometre or a picometre. Just…why?
Show threadHuleDec 13

… 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

Angstrom - Wikipedia

Show threadpipe01Dec 10
That symbol means Armstrongs, but that’s all I know
Show threadAlolanYodaDec 10
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
Show threadblackbrookDec 10
I’m taking a moment to appreciate it right now.
Show threadSkybreakerEngineerDec 10
Show threadVocationConfiningDec 10

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!

Show threadtoynbeeDec 10
When do the blondes, brunettes and redheads show up?
Show threadAlolanYodaDec 10
Spending a day doing SEM and seeing fuck all then seeing this meme feels targeted