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To be fair, a cutting torch doesn't really produce enough UV to cause eye damage. You'll be seeing spots for a while if you look right at the white-hot metal, but you aren't going to go blind or get arc eye (unless you're cutting for a very long time, I guess). The goggles in this case would be more to protect against pops and spits of molten steel.
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Sep 20, 2017 19:20
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Serak posted:oh, poo poo - Dam failure in Laos I'm the white truck that blocks the red truck in while slowly backing out.
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Sep 20, 2017 19:59
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Meredith Baxter-Burnout posted:I'm the white truck that blocks the red truck in while slowly backing out. Those trucks were moving laughably slow, wtf?
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Sep 20, 2017 21:01
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JB50 posted:Those trucks were moving laughably slow, wtf? The road grader is blocking the exit. Because the guy driving it jumped and ran leaving it in gear.
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Sep 20, 2017 21:04
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Proteus Jones posted:The road grader is blocking the exit. Because the guy driving it jumped and ran leaving it in gear. At least the alignment on the grader was good. was.
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Sep 20, 2017 21:04
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That'll buff out, right? https://mobile.twitter.com/Adam4NY/status/910585511584071680
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Sep 20, 2017 21:29
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https://i.imgur.com/Yc5hTAi.gifv
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Sep 20, 2017 21:45
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Yo re eye protection I have a question that seems suitable for the thread. So fenyman had a bit in his biography where he watched the first nuclear explosion through auto glass instead of smoked goggles since nothing harmful to your eyes would get through auto glass, you'd just be temporarily blinded. Why can't you watch an eclipse the same way?
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Sep 20, 2017 21:49
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Benagain posted:Yo re eye protection I have a question that seems suitable for the thread. So fenyman had a bit in his biography where he watched the first nuclear explosion through auto glass instead of smoked goggles since nothing harmful to your eyes would get through auto glass, you'd just be temporarily blinded. Well sure you could but it would require extensive preparation to detonate a nuclear bomb at the same time as the eclipse and, quite frankly, I think it would, well, figuratively eclipse the literal eclipse pretty much so it would be rather pointless.
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Sep 20, 2017 21:53
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During totality it's pretty dark. Your pupils are as large as they're gonna get, then suddenly you get the full force of a tiny % of the sun's light into that wide open pupil and the damage is done. I imagine. With welding your pupils will be contracted and let less light in.
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Sep 20, 2017 21:55
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Budgie posted:During totality it's pretty dark. Your pupils are as large as they're gonna get, then suddenly you get the full force of a tiny % of the sun's light into that wide open pupil and the damage is done. I imagine. With welding your pupils will be contracted and let less light in. Yeah don't weld your eyes people.
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Sep 20, 2017 21:56
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the boat tower loving owns
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Sep 20, 2017 21:56
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1) a nuclear detonation produces all of its dangerous high-energy radiation (e: discounting fallout and decay products) in a few milliseconds, like the pop of a flashbulb going off. Even a very high instantaneous power level doesn't translate into much actual energy if you're talking about a very short timescale. After the burst, all you see is the fireball of incandescent air, which is relatively safe to look at. Eclipses last several minutes, giving plenty of time for your retinas to absorb energy and burn. 2) the biggest nuclear bombs ever detonated exploded with the force of 50 megatons of TNT. The Trinity test that Feynman was watching had a yield of around 15 kilotons, or 0.03% of the largest bombs we've built. The sun, on the other hand, produces energy at a rate of 90 billion megatons of TNT per second. Even 150 million kilometers away, that's still an unfathomably large amount of power. 3) about half the sun's energy output is infrared (heat) radiation, which is not blocked by window glass and which will still physically roast your eyeballs like the heat from a fire. Sagebrush fucked around with this message at 22:06 on Sep 20, 2017 |
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Sep 20, 2017 21:59
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https://i.imgur.com/0F5F9kx.gifv
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Sep 20, 2017 22:08
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That said I looked at the eclipse through a layer of cloud cover and a pair of blowtorch goggles with a shade lighter than what NASA recommended and I still haven't gone blind.
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Sep 20, 2017 22:08
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Benagain posted:Yo re eye protection I have a question that seems suitable for the thread. So fenyman had a bit in his biography where he watched the first nuclear explosion through auto glass instead of smoked goggles since nothing harmful to your eyes would get through auto glass, you'd just be temporarily blinded. From where Feynman was standing, peak brightness was 36.4 Kw / square meter for ~100 ųs. It seems an out of character risk for a guy who was so scared of weed. shame on an IGA fucked around with this message at 22:19 on Sep 20, 2017 |
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Sep 20, 2017 22:17
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aaaaaaaaa
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Sep 20, 2017 22:23
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Ah yes, I do suppose it's been a couple of months again since this was last posted. The cycles this thread go through are intriguing.
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Sep 20, 2017 22:33
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God I was clenched tight that entire gif.
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Sep 20, 2017 22:45
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Glagha posted:God I was clenched tight that entire gif. Go on....
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Sep 20, 2017 22:51
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I bought my solar viewing glasses on Amazon a good 4 months before the eclipse (because I knew they would run out) and then got a refund for them because they couldn't verify them as authentic. I thought they seemed good when I had used them on normal days before that, so I went for it. Still can see.
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Sep 20, 2017 22:58
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This is a great example of a PASSIVE SAFETY process. As long as he stands in the middle, its impossible for the train to hit him, as the two bumpers to either block the middle of the train from reaching him.
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Sep 21, 2017 01:26
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Applebee123 posted:This is a great example of a PASSIVE SAFETY process. As long as he stands in the middle, its impossible for the train to hit him, as the two bumpers to either block the middle of the train from reaching him. what if he misjudges the speed of the second train car and doesnt keep pace with the gap
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Sep 21, 2017 01:28
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Raskolnikov38 posted:what if he misjudges the speed of the second train car and doesnt keep pace with the gap That also has to make one helluva a loud clang when they hit. He doesn't strike me as the earpro type.
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Sep 21, 2017 01:47
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Yea, 'totes safe'. As opposed to a proper coupling system that doesn't require a man in the kill-zone. So, at 35 I'm back in college for a chem degree and am working as a lab assistant. First project: Inventory everything in the lab and write down it's CAS-RN so that we can double check that we have the correct SDSs. Didn't find much OSHA. Someone was storing milk in the lab-fridge full of solvents/chems. We found about 5 bottles from Eastman Kodak dating back to the sixties. That was kinda cool. Found out today it was for an intro-chem lab. The jar of pickles is definitely not part of a lab though and they are slowly disappearing from the jar. I think I scared my work-mate though. "Next is... Glycerin. NOT nitroglycerin." me: "Not yet! There's plenty of nitric acid across the hall."  him: 
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Sep 21, 2017 04:39
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Moto42 posted:I think I scared my work-mate though. This is great. Some days I scare a few co-workers on purpose in a similar manner just mumbling away and mention something random that could be dangerous to a coworker like "I wonder if we set up a ramp system, have these 45kg gas bottles at the top like a drinks machine, and when we need some just push a button and they roll straight into the truck! No more lifting injuries!" Obviously I am joking but for a split second they aren't sure.
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Sep 21, 2017 04:56
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Moto42 posted:We found about 5 bottles from Eastman Kodak dating back to the sixties. That was kinda cool. Well, let us know how the photos turn out!
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Sep 21, 2017 06:20
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Careful Humphreys. That's how you end up revising proposals to spew the much safer elemental mercury all over the countryside, instead of dimethylmercury.
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Sep 21, 2017 06:34
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Keiya posted:Careful Humphreys. That's how you end up revising proposals to spew the much safer elemental mercury all over the countryside, instead of dimethylmercury. I shouldn't have told a few a story of an ex whose dad keeps Uranium Ore in a desk drawer. They already all think I can make nukes from it.
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Sep 21, 2017 07:03
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I had a teacher who kept a stack of Fiestaware Red plates in a cupboard on one side of the classroom. I never followed up on my classmates to see if any developed superpowers.
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Sep 21, 2017 07:20
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Humphreys posted:I shouldn't have told a few a story of an ex whose dad keeps Uranium Ore in a desk drawer. They already all think I can make nukes from it. You've heard of the Elf on a shelf, but did you know about the uranium ore in desk drawer? Wait, this isn't the meme thread.
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Sep 21, 2017 07:21
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Humphreys posted:I shouldn't have told a few a story of an ex whose dad keeps Uranium Ore in a desk drawer. They already all think I can make nukes from it. My academic supervisor had a really lovely piece of Autunite underneath a lead crystal dome in his office for years, before he retired and gifted it to the university. It glowed like a motherfucker when you hit it with UV. He also had a piece of Trinitite that I was super jealous of, would love a sample of that.
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Sep 21, 2017 07:34
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No accidents since forever. Pu the Hammer on the brother! #Goonsqusd (doing hashtags now).
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Sep 21, 2017 07:35
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If my job has taught me anything it's that you never voice a stupid idea for a joke because you'll end up spending the next year of your life trying not to kill someone making your "hilarious" idea a reality.
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Sep 21, 2017 07:45
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cakesmith handyman posted:If my job has taught me anything it's that you never voice a stupid idea for a joke because you'll end up spending the next year of your life trying not to kill someone making your "hilarious" idea a reality. Just make sure any stupid idea you have is self terminating and you're not the one on the platform.
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Sep 21, 2017 07:51
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Careful... https://i.imgur.com/h4qzYJr.mp4
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Sep 21, 2017 08:30
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Wow! It's a good thing that friendly giant happened to be passing by.
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Sep 21, 2017 09:37
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The giant isn't wearing appropriate Hi-Vis gear.
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Sep 21, 2017 14:32
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Sagebrush posted:3) about half the sun's energy output is infrared (heat) radiation, which is not blocked by window glass and which will still physically roast your eyeballs like the heat from a fire. 4. There are different kinds of UV light. Plain glass blocks UVB, UVA can still cook your retinas. 5. While Feynman was an amazing physicist and rationalist he was also an amazing bullshitter and a lot of his stories need to be taken with a large grain of salt.
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Sep 21, 2017 14:45
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https://i.imgur.com/h4qzYJr.gifv
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Sep 21, 2017 16:40
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