Alt accounts that are also me:
Looks like the sub.rehab project is no longer active.
This repository was archived by the owner on Mar 7, 2025. It is now read-only.
A “spiritual successor” to this project has been created by @rglullis@communick.news over at https://fediverser.network/communities
This is not very fun
This is not that fun. (5 syllables)
FTFY.
!dadforaminute@lemmy.world exists, but no one has posted yet.
@Nougat@fedia.io @khannie@lemmy.world Should we try and grow it?
You could try growing !askdad@lemmy.world.
I believe in air index of refraction is a function of (1/wavelength)^4
Isn’t that for Rayleigh scattering, not refraction?
special cuvettes made out of quarts
That’s an absolute unit of a cuvette. I think you might have meant “quartz” :)
Green has the largest spectrum among the colors of the visible spectrum with a difference from shortest to longest wavelength at about 85 nm. If this were assigned a length of 1 cm, you would have to slide 2.1 cm down to enter infrared territory
I think this is incorrect. The angle subtended by a given portion of the spectrum is not linearly correlated with the wavelength. The angle is close to zero for long wavelengths, and rises sharply for very short wavelengths.
Don’t longer wavelengths bend less when going through a prism? The bands of infrared, microwaves, and radiowaves might be bunched up pretty close to each other.
There’s an old Sixty Symbols video where they build microwave prisms out of triangular pieces of cardboard filled with loose pellets of wax. Since the pellets are smaller than the wavelength of the microwaves, they behave as though the prism were solid wax.
In theory yes, in practice, I think it would depend what your prism is made of. A given material is not transparent to all wavelengths.
I found a few, none active, but some which could be consolidated or revived.
This kind of thing bugs me so much.
At one point I had to sit down and write out a list of every action I do whenever I get home, and then sequence them to minimize the required number of handwashings.
Oxidative stress likely contributes to ageing, but is not the sole cause of it. Antioxidants alone are not the “fountain of youth”.
Kind of surprised that you went with lemmy.ca for this community over sopuli.xyz or lemmy.blahaj.zone, but I guess Canada and Norway are pretty good friends :)
that could stick around unreasonably long, maybe, for minutes or hours… is that even possible?
Possible, yes, probable, no.
Suppose we have a particle with a half-life of one second. To have decent odds of one sticking around for n seconds, you’d need to observe around 2^n particles. For 10 seconds, that’s 1024 particles. For 20 seconds, that’s around million particles, 30 seconds, ~1 billion particles. To see a particle last for one minute, you’d have to observe ~1,000,000,000,000,000,000 particles.
Particles observed at the LHC typically have half-lives of much less than one second.
Nice! You might also consider promoting it on !aviation@lemmy.zip. Perhaps you could even work with the mods to pin links to each others communities in the sidebars.
The average lifetime would always be greater than the half-life, because a few long lived particles will stick around a while, pushing up the average.
At the LHC, each individual collision occurs over a tiny fraction of a second, but the experiments can take months to collect enough data.
Just a quick markdown tip: If you want the asterisks to show up, you need to escape them with backslashes, otherwise they are rendered as italics.
y = a1\*x1 + a2\*x2 + …
Renders as:
y = a1*x1 + a2*x2 + …