this post was submitted on 06 Apr 2026
300 points (99.3% liked)
pics
29645 readers
2031 users here now
Rules:
1.. Please mark original photos with [OC] in the title if you're the photographer
2..Pictures containing a politician from any country or planet are prohibited, this is a community voted on rule.
3.. Image must be a photograph, no AI or digital art.
4.. No NSFW/Cosplay/Spam/Trolling images.
5.. Be civil. No racism or bigotry.
Photo of the Week Rule(s):
1.. On Fridays, the most upvoted original, marked [OC], photo posted between Friday and Thursday will be the next week's banner and featured photo.
2.. The weekly photos will be saved for an end of the year run off.
Instance-wide rules always apply. https://mastodon.world/about
founded 3 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
If I'm not mistaken, the water looks bright blue because some particles are going faster than light in this water. So it emits a blue flash akin to the Sonic boom when a plane goes faster than sound speed in the atmosphere. https://en.wikipedia.org/wiki/Cherenkov_radiation
Not sure about this particular experiment, but neutrino detectors are usually deep underground and trying to find a tiny tiny spark of Cherenkov radiation or other effects.
I'm guessing the blue colour is simply paint.
From Wikipedia (and my neutrino physics knowledge) , the goal is to measure neutrino oscillation (neutrino charge flavour when travelling), and it seens to be a set of detector located at various distance from a nuclear reactor. The photo mostly looks like one of the reactors rather than the detector
maybe the neutrinos are emitting blueberry charge flavor.
I stand corrected. It certainly doesn't look like paint & who would want blue water.
I mean... I'm not saying that isn't happening but also water is just blue.
...water isn't blue 🤨
...have you been drinking blue water? 🤨
It is slightly blue, it's just only noticeable when it gets deep enough. So yeah we've all been drinking blue water lol
Water IS blue but not enough to explain why the ocean is as blue as it is
Wikipedia
The color of the ocean is due to atmospheric scattering affecting blue light (short wavelength) more than longer wavelength.
Ok so it wouldn't affect a small pool like in the picture.
Keep moving those goalposts
I'd expect no less from a feddit user
😡😡😡😡<- u rn lol
If you bothered looking at the first image in intrinsic color it would show you that youre wrong, but you seem to know better
Duke was here to learn but apparently you’re just here to be a jerk.
Yup, it's basically the underwater version of sonic booms. Pretty cool stuff
I've seen it from afar and it is indeed a bright blue.
Edit: I don't think that is what we are see here though. It looks like the water itself might have something added to it. There are several elements that absorb neutrons. Such as boron but I'm unsure what color it would be dissolved in water. I inhaled boron gas when I was on the first crew into the containment building at a shutdown. Had to stay at decon until it was out of my lungs.
I saw the spent fuel pool at a nuke from over a hundred feet. It was low light and you could clearly see the blue glow from the spent fuel rods. We were just passing through so it was a quick look to the work site and back from it.
I've also seen a reactor shutdown with the fuel rods exposed in preparation for a fuel shuffle. There may have been a glow but all the lights were on so it would have been washed away.
Yup, pretty much the only kind of radiation we can see without melting your eyeballs.
Fun fact, you can totally swim in that pool. Don’t go too deep but it’s cleaner and safer than your average public pool.
Thats cool as fuck, thanks for explaining!