524
rulebalt-60 (lemmy.blahaj.zone)
submitted 1 day ago by possumparty to c/onehundredninetysix
top 43 comments
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[-] Redjard@reddthat.com 82 points 16 hours ago

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 2 points 1 hour ago

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

[-] trolololol@lemmy.world 2 points 3 hours ago

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 4 points 2 hours ago* (last edited 2 hours ago)

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 1 points 33 minutes 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 13 points 10 hours ago
[-] trolololol@lemmy.world 4 points 3 hours ago

I'm having fun, so thanks

And leave your bad vibes at the door, tank you

[-] magic_smoke 40 points 10 hours ago

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

[-] Malyca@lemmy.zip 6 points 2 hours ago

Perhaps he means it

[-] Redjard@reddthat.com 20 points 10 hours ago
[-] HugeNerd@lemmy.ca 4 points 9 hours ago

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

[-] Redjard@reddthat.com 4 points 6 hours 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 [...]

[-] bedwyr@piefed.ca 2 points 9 hours ago

Looks like a radiation warning on that.

[-] Berengaria_of_Navarre@lemmy.world 6 points 16 hours ago

My neighbour really wants some strontium 90 flavoured chocolate.

[-] ChicoSuave@lemmy.world 30 points 23 hours ago

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

[-] brem@lemmy.world 43 points 1 day ago

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 29 points 20 hours ago

Hand fell off.

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

[-] brem@lemmy.world 26 points 20 hours ago
[-] AnchoriteMagus@sh.itjust.works 67 points 1 day ago

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

[-] Rhaedas@fedia.io 55 points 1 day ago

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

[-] turbowafflz@lemmy.world 33 points 1 day ago

why would you even make that what purpose does that serve

[-] panda_abyss@lemmy.ca 49 points 1 day ago

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

[-] KokusnussRitter@discuss.tchncs.de 5 points 18 hours ago

You are evil! I like it :D

[-] AnchoriteMagus@sh.itjust.works 52 points 1 day ago

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 13 hours ago

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 11 hours ago

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 11 points 11 hours 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 4 points 11 hours ago

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 3 points 3 hours ago

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

[-] sp3ctr4l@lemmy.dbzer0.com 20 points 22 hours ago

... forbidden toosie roll ...

[-] fartographer@lemmy.world 10 points 21 hours ago

It's so rads!

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 6 points 13 hours ago

Curie lab technicians hate this one weird trick

[-] CIA_chatbot@lemmy.world 44 points 1 day ago* (last edited 13 hours ago)

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

[-] half_built_pyramids@lemmy.world 16 points 1 day ago
[-] Una@europe.pub 12 points 1 day ago
[-] I_am_10_squirrels@beehaw.org 1 points 8 hours ago

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

[-] wake@quokk.au 9 points 1 day ago

Forbidden Tootsie roll

[-] X@piefed.world 5 points 1 day ago
this post was submitted on 11 May 2026
524 points (100.0% liked)

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