this post was submitted on 11 May 2026
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[–] Redjard@reddthat.com 92 points 1 day ago (4 children)

I see the stylisric reason to only apply the effect around the object, but it isn't realistic.
That radiation isn't affected by optics, it'll go right through the lenses that flip and focus the image and the aperture that might be engaged, and will hit the entire sensor equally. The entire image should be that noisy.

[–] Hadriscus@jlai.lu 5 points 1 day ago

Yea my thoughts too,... although with less facts to back them up

[–] trolololol@lemmy.world 3 points 1 day ago (1 children)

Oh cool

So if you had a camera with mirror would it still go a bit through the enclosure and hit the sensor?

What if the sensor is flipped so it has to go through the silicon substrate before hitting the sensitive bits, would it be equally noisy but less noisy overall?

[–] Redjard@reddthat.com 5 points 1 day ago* (last edited 1 day ago) (1 children)

Yes. Silicon substrate is too thin to matter. Redirecting with mirrors is probably gonna make it worse. Your housing would need over a cm of solid plastic to block beta radiation. On a dedicated camera you might have a sizeable lens with many lenses totalling a cm of shielding, but redirect the light and place the sensor not behind the lens and you only have that camera housing.

Realistically though you have a smartphone, and that β-radiation will probably make it most of the way through the entire thing.

And the gamma radiation really won't care, even if you have a 50cm long zoom lens right between the sensor and source.
This is where you might want a lead brick wall, 10cm thick should make it short-term safe for ⁶⁰Co.

Edit: forgot this was in general, not about the β

[–] BygoneNeutrino@lemmy.world 2 points 1 day ago

I was going to include a tangent on how difficult it is to shield a spacecraft from cosmic radiation, but I'll wait for a more appropriate post. Thanks for the refresher.

[–] SaveTheTuaHawk@lemmy.ca 5 points 1 day ago (3 children)
[–] magic_smoke@lemmy.blahaj.zone 44 points 1 day ago (1 children)

If you don't like neurodiverse people going off about special interests wtf are you doing on 196?

[–] Malyca@lemmy.zip 9 points 1 day ago

Perhaps he means it

[–] Redjard@reddthat.com 23 points 1 day ago
[–] trolololol@lemmy.world 6 points 1 day ago

I'm having fun, so thanks

And leave your bad vibes at the door, tank you

[–] HugeNerd@lemmy.ca 4 points 1 day ago (1 children)

Beta particles wouldn't go through the glass in the first place.

[–] Redjard@reddthat.com 6 points 1 day ago

The beta emission of ⁶⁰Co can probably get through over 6mm of glass. This should be plenty for phones.

But also

⁶⁰Co undergoes beta decay to an excited state of the stable isotope nickel-60 (⁶⁰Ni), which then emits two gamma rays [...]

[–] AnchoriteMagus@sh.itjust.works 68 points 2 days ago (2 children)

Replicas of Cobalt-60 sources can be got on Ebay for as little as $12.

[–] Rhaedas@fedia.io 55 points 2 days ago

With or without the camera degradation? I'll bet that cost extra.

[–] turbowafflz@lemmy.world 34 points 2 days ago (3 children)

why would you even make that what purpose does that serve

[–] panda_abyss@lemmy.ca 51 points 2 days ago (1 children)

Telling a physics grad student to catch it and then seeing their existential dread?

You are evil! I like it :D

[–] AnchoriteMagus@sh.itjust.works 53 points 2 days ago (1 children)

Paperweight / conversation starter. As long as you know it's not real, it's just a cool chunk of brass.

[–] Gladaed@feddit.org 19 points 1 day ago (2 children)

Shouldn't be allowed to exist. This removes the terror and fear of seeing an actual Co-60 rod and may kill someone.

Never abuse warning labels for comedic effect. This is deadly.

[–] turbowafflz@lemmy.world 10 points 1 day ago (1 children)

Yeah, wasn't a source lost on the side of the road in Australia a year or two ago where anyone could have picked it up if they didn't know better

[–] Gladaed@feddit.org 12 points 1 day ago

Yes, 3 years ago.

These things are no joke. Proper labeling is no joke. They found it at some point. Just went where they had been and used a Geiger counter.

[–] Cethin@lemmy.zip 5 points 1 day ago (1 children)

Yep. The only reason it should exist is for a demonstration piece, to say if you see it to drop it and run, and inform the proper authorities.

[–] trolololol@lemmy.world 4 points 1 day ago

In this case it should also have engraved something like " not actually cobalt just a security training mock"

[–] expatriado@lemmy.world 13 points 2 days ago (1 children)

Ebay

we sell all the stuff that will puzzle you

[–] brem@lemmy.world 45 points 2 days ago (1 children)

Replaced phone after the screen started bubbling for some reason.

Hand fell off.

Using other hand on a new phone, but I'm having trouble seeing anything at all now

thnx

[–] zergtoshi@lemmy.world 30 points 2 days ago (1 children)

Hand fell off.

Yeah, that’s not very typical, I’d like to make that point.

[–] glizzyguzzler@piefed.blahaj.zone 51 points 2 days ago (1 children)

I highly recommend holding it within 3 feet of your body for 5 to 10 minutes; absolutely nothing can go wrong from holding a Cobalt-60 source with 3540 Curies in 1963 within 3 feet of your body for 5 to 10 minutes!

[–] Midnitte@beehaw.org 7 points 1 day ago

Curie lab technicians hate this one weird trick

[–] CIA_chatbot@lemmy.world 45 points 2 days ago* (last edited 1 day ago) (1 children)

Y’all looking at the radio-active isotope, while I can’t see past the mutated hotdog fingers

[–] ChicoSuave@lemmy.world 31 points 2 days ago

That's a magic wand which makes the air taste like pennies.

[–] sp3ctr4l@lemmy.dbzer0.com 20 points 2 days ago (1 children)

... forbidden toosie roll ...

[–] fartographer@lemmy.world 11 points 2 days ago

It's so rads!

[–] half_built_pyramids@lemmy.world 16 points 2 days ago (1 children)

My neighbour really wants some strontium 90 flavoured chocolate.

[–] Una@europe.pub 13 points 2 days ago (3 children)
[–] I_am_10_squirrels@beehaw.org 2 points 1 day ago (1 children)

You won't need to eat anything else for the rest of your life!

[–] Una@europe.pub 2 points 12 hours ago

That's good thing, I love highly caloric food!!

[–] wake@quokk.au 9 points 2 days ago

Forbidden Tootsie roll

[–] X@piefed.world 5 points 2 days ago (1 children)
[–] Una@europe.pub 2 points 12 hours ago
[–] bedwyr@piefed.ca 2 points 1 day ago

Looks like a radiation warning on that.