this post was submitted on 24 Aug 2025
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Lemmy Shitpost

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top 24 comments
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[–] ReverendIrreverence@lemmy.world 2 points 4 hours ago

...and you'll be having no more kids after that anyway.

[–] Venus_Ziegenfalle@feddit.org 7 points 11 hours ago

It's a boy(kisser)!

[–] iAvicenna@lemmy.world 2 points 9 hours ago

you are dead either way

[–] kibiz0r@midwest.social 35 points 1 day ago (1 children)

The demon core is, at the same time, the dumbest thing I’ve heard someone do, and yet…

“Here’s a vessel containing the most powerful force yet discovered. Nobody’s seen it in person before. A quick peek probably won’t kill you.”

“Hmmm… fuck it.”

[–] SkunkWorkz@lemmy.world 4 points 5 hours ago (1 children)

“Also if this dome closes we are all dead. Let’s keep it open with this special device called a screw driver“

Screwdriver slips out of the gap.

💀

[–] InputZero@lemmy.world 5 points 5 hours ago

Even worse they had a device that could safely move the berilium spheres without the risk of them falling which would prevent the demon core from going prompt critical but no... Louis Slotin thought so highly of himself he literally couldn't think that he could make a mistake and accidentally killed himself. Let that be the lesson that no one is mistakeproof.

[–] ceenote@lemmy.world 34 points 1 day ago

For when you're dying to know the sex.

[–] Linsensuppe@feddit.org 33 points 1 day ago (2 children)

So its was boy! Does that mean little boy is now a big brother?

[–] MedicPigBabySaver@lemmy.world 29 points 1 day ago (1 children)
[–] ininewcrow@lemmy.ca 4 points 22 hours ago

With one eye and three hands

All I know is that little boy was the last kid of his father.

[–] over_clox@lemmy.world 11 points 1 day ago

This is why you don't circumcise your baby, especially with a screwdriver..

[–] Gustephan@lemmy.world 11 points 1 day ago

If this thing is emitting light that appears blue to you, you're about to have a monumentally bad time

[–] matmarspace@programming.dev 3 points 21 hours ago

If it flashes it's dead. 😭😅

[–] zeropointone@lemmy.world 15 points 1 day ago (1 children)

Good old Cherenkov radiation. Always reliable.

[–] sleep_deprived@lemmy.dbzer0.com 14 points 1 day ago* (last edited 1 day ago) (1 children)

Somebody please correct me if I'm wrong, but I believe due to the very low refractive index of about 1.0003, particles need tremendous energy to produce Cherenkov radiation in atmosphere. So the demon core flashes (while perhaps some negligible part Cherenkov) were probably mostly just from the ionization of the air, and subsequent nitrogen/oxygen fluorescence.

If my awful phone math is right, you'd need about 21 MeV of energy for an electron to produce Cherenkov radiation. I think the processes producing energetic electrons here (Compton scattering, some pair production, photoelectric effect, internal conversion, delta rays, and Bremsstrahlung cascade I believe) should regularly produce energies around 10 MeV at most (from Compton).

[–] peoplebeproblems@midwest.social 15 points 1 day ago (2 children)

IIRC the flash wasn't discernable from being the air or the aqueous/vitreous humor in the eye.

I think it's been hypothesized that the eye jello allows for a much lower energy particle to to create the flash. They do know it's possible to induce it, but it's not exactly ethical to test the conditions that created the various criticality accidents to find out.

[–] nialv7@lemmy.world 2 points 8 hours ago* (last edited 5 hours ago) (1 children)

I heard it's also possible that the radiation hit your retina and make your neurons go off? Maybe even your visual cortex?

[–] peoplebeproblems@midwest.social 2 points 6 hours ago* (last edited 6 hours ago)

Again, it's not easy or ethical to test, but any charged particle interaction with a nerve for instance will possibly trigger an action potential, inducing the "light" that is witnessed. However, this is unlikely given that the optic nerves are pretty well protected.

What is more likely to occur is that a sufficient amount of gamma rays or x-rays ionizing the nerve or nerve sheathe itself and those unstable particles decay into something that releases a charged particle triggering the nerve signal.

[–] sleep_deprived@lemmy.dbzer0.com 9 points 1 day ago (1 children)

Oh cool! I hadn't considered that. The crystallin and vitreous humor in the eye do indeed have a refractive index similar to water, so Cherenkov radiation happens at less than 1 MeV IIRC, so it comes down to how much light would actually be produced in such a small volume. It does seem perfectly feasible!

[–] Zwiebel@feddit.org 4 points 11 hours ago (1 children)

So we can see radiation afferall

[–] peoplebeproblems@midwest.social 1 points 6 hours ago

Sort of? Radiation refers to any ionizing wave- particle. This means ultraviolet, x-rays and gamma-rays are not possible to see.

Alpha and beta particles can only produce visible light if they are moving faster than the medium that light travels through. Because Alpha and Beta particles are massive they cannot reach c (speed of light in a vacuum) but in water, as being discussed, any velocity >0.75c will produce the light.

Electrons and positrons are a much lower mass and require much lower energy to get moving at a sufficient speed. This means beta decay is a candidate for it, but the beta decay of naturally radioactive elements is too low of an energy for this to be observed. In nuclear fission, the neutrons won't interact this way as they aren't charged. The immediate fission products, however, are usually of very high instability and some of these do decay by beta emission in a very short period of time.

Alpha particles, which are usually 5 mev, do not create the light, as they are much more massive. These are released from things like Uranium-238 to Thorium-234.

[–] someguy3@lemmy.world 5 points 1 day ago (1 children)

I've heard of people accidentally making IEDs for gender reveal, now I've heard of everything.

[–] Zink@programming.dev 2 points 7 hours ago

The last time I made an IEWMD for a gender reveal it ruined the whole evening.