7 ms·
You know, in some places there are warning signs that read: Do not look into laser with remaining eye (https://qph.cf2.quoracdn.net/main-qimg-1482f39eeb7fe2a2ab
by ExoticPearTree 3y ago
You know, in some places there are warning signs that read: Do not look into laser with remaining eye (https://qph.cf2.quoracdn.net/main-qimg-1482f39eeb7fe2a2abc3631275f95e42-c https://qph.cf2.quoracdn.net/main-qimg-1482f39eeb7fe2a2abc36...).
Anyway, common sense says you don't look with your unprotected eye through a fiber endpoint.
- onionisafruit 3y agoWhat does that mean? I read it as people who have already lost an eye shouldn’t risk their only remaining eye, but I think I’m missing something.
- ttoinou 3y agoYeah it's provocatively funny
- onionisafruit 3y agoThanks. I must be awake too early because it didn’t occur to me the sign is a joke.
- afandian 3y agoI think part of the joke is that damage is instantaneous so if you’re not prepared you can’t take evasive action.
- I_Am_Nous 3y agoOn top of this, we can't see 800 nm light. That's well into the Infrared band so "invisible lightsaber for your eyes" is an exaggeration, but helps visualize what you could be dealing with.
- tgsovlerkhgsel 3y agoIt's tongue-in-cheek, implying that many people working with the stuff already lost an eye to it. It's part joke and part telling people "hey, this stuff is really dangerous, take it seriously or you'll lose an eye, or both". I don't think I've seen a single lab with high-powered lasers that didn't have a variant of this sign. A similar popular sign for chemical labs is "Carol Never Wore Her Safety Goggles. Now She Doesn't Need Them", depicting a blind woman with sunglasses and a white cane. (https://knowyourmeme.com/memes/carols-safety-goggles https://knowyourmeme.com/memes/carols-safety-goggles)
- jakderrida 3y ago[flagged]
- bipson 3y agoInclusion goes both ways? On a serious note: What are you on about?
- jakderrida 3y ago> Inclusion goes both ways? Yes, I agree. That's why making it a girl is so hilarious. As to why you're so offended that I find it hilarious, I honestly don't know what to tell you. It's funny for the same reason I'll refer to a hypothetical serial killer as "him" and follow by saying "or her, of course" to females as if I'm pandering. The joke is that they weren't offended to be excluded from being serial killers.
- bipson 3y agoIt's not hilarious. And I'm not offended. I just have zero idea what your issue is. I never gave it any second thought what gender the person is. I don't care and I wonder what you're reading into it.
- NickM 3y agoI am curious, though, why they made Carol a girl. I guess depending on your political agenda they were either trying to be inclusive and promoting gender diversity in STEM, or they were being subtly misogynistic by implying that women aren't as careful as men. Or maybe it was just arbitrary and maybe we don't have to read anything into it? But what do I know.
- redog 3y agoI think that sometimes when humor is added, in this way, it is to make you pause first. At least in my mind when I encounter something oddly said/written my mind starts suggesting contexts and I can clearly "see" myself going blind by doing me like things.
- marcosdumay 3y agoIt emphasizes that you will only notice there's something dangerous around after you are already blind. It's a very well worded warning, that spread because it's effective. The official warning saying that you must take precautions even if you don't see anything wrong just doesn't work well.
- willis936 3y agoWhat does looking at a laser have to do with being safe from a class 4 laser? You could be two rooms over and be blinded by it if there are specular surfaces (which there usually are).
- jakderrida 3y agoYou probably still shouldn't look into the laser with your remaining eye, though.
- xtiansimon 3y ago“Common sense”? Never had one of those toys… https://images.app.goo.gl/nFwVrEe26vkxxJWLA https://images.app.goo.gl/nFwVrEe26vkxxJWLA
- xxs 3y agoYou dont have to look at the laser at all, scattered beam can be dangerous as well. Note: class 4 lasers have no upper bound, they are just hazardous.
- jahnu 3y agoHave these ever been weaponised?
- cyberax 3y agoIt's against the Geneva Convention to use blinding weapons.
- Snow_Falls 3y agoHas the Geneva convention ever stopped anyone? They can only arrest you if you lose the war, and people don't tend to plan for that.
- xxs 3y agoThe application would be more civil than war-alike, if it existed.
- Snow_Falls 3y agoThat's even harder to prosecute, pretty much no one is starting a war over what rulers are doing to their own citizens.
- xxs 3y agoStill need a major supplier both the laser emitters and esp. the optics. The weapons will be a lot more expensive compared to conventional weapons, or any anti-riot weaponry. Aside the sci-fi vibe, I could imagine James Bond esque - still quite hard to use, has to aim for the eyes, scatter can cause collateral damage, doesn't work in fog, rain, etc.
- Bluecobra 3y agoMost fiber/transceivers you commonly find in a datacenter won’t cause eye damage: https://www.nanog.org/news-stories/nanog-tv/top-talks/tutorial-everything-you-always-wanted-know-about-optical-networking/ https://www.nanog.org/news-stories/nanog-tv/top-talks/tutori... (slides 79-84)
- mikewarot 3y agoThis is definitely not a most common transceiver, which is the point of all the commentary. I'd refuse to buy this thing unless there was some national security reason for doing so, and then there would have to be interlocks on the room to de-energize it when anyone entered.
- runjake 3y agoDisclaimer: I recommend you don't look at lasers as a standard practice. For more context, an SFP+ 10G LR 10km module is Class 1 (completely harmless during normal use). Same with a 100G LR4 type module. The ZR type modules that run 100+km are also Class 1. Pretty much any optical module you plug into a router or a switch is Class 1. Where you should definitely be cautious is: - Around optical amplifiers, where things can get into Class 2 and 3. - DWDM setups where each module may be a Class 1, but the sum of their light adds up into something harmful.
- gorlilla 3y agoThey are class-1 only because the system is designed to not have any light visible during normal operation. Interlocks can be the only difference between a class-1 and a class-4 laser.
- dpratt 3y ago"Danger: Not Only Will This Kill You, It Will Hurt The Whole Time You're Dying"
- AriedK 3y agoI find these tremendously helpful https://i.etsystatic.com/13650636/r/il/617182/2062686717/il_1588xN.2062686717_n8xu.jpg https://i.etsystatic.com/13650636/r/il/617182/2062686717/il_... as popularized by AvE