The Horrors of UV radiation 

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Never understood why people want to use tanning beds, I will never lay down in the cancer bed

As an introvert staying inside a lot, I see this as an absolute win

I was a 1980s goth. I’ve been avoiding sunlight for 40 years.

Ow maaaan, so you are telling me I won't gain any superpowers?

my brain is so cronically broken that when i saw the electron move i unironically though "hehe, radiation makes electron angry"

Looking forward to “The Dark Science of Wave Particle Duality”

Sitting under a UV light for warmth gives 2001 Lia radiological accident vibes. Three men looking for firewood in snow covered forest in Georgia stumble across 2 metal canister radiating heat. They proceeded to use them as a heat source and getting radiation poisoning because they were radioisotope thermoelectric generator. Pretty brutal story with me hearing about it from Kyle Hill and Plainly Difficult

Thank god, someone finally actually gave a proper explanation of how UV is damaging despite not being ionizing. Thank you so much, this was really informative, and scratched an itch I've had for years now!

You should always consider getting any weird moles checked. Melanoma is a very curable cancer if you catch it early. Though it is rare you should still keep a bit of an eye out for any weird looking lesions on your skin.

"He's exposed himself to lethal radiation! Quick, fire him for sleeping on the job!"

That is horrifying to think about. Taking a short nap in a warm room turning into getting cancer.

Damn they really did that guard dirty. It's not like he knew or did it on purpose but better to cut all ties asap than to later be forced to pay settlements.

“Decades of poor diet” Side eyes the ice cream sandwich in hand👀

I am a welder, UV is always a risk. Most other welders are too careless

I thought this channel was called "Dark" science haha!! UV got to be kidding me!!! great work as always :)

Hello! My dermatologist, and several other places I've read about skin care, says that UV skin protection is to be used not only "when it is sunny, or when you are outside in the sun". It must be applied everyday, even on cloudy/cast days because UV light/rays are not the same as visible light rays.

THE SUN IS A DEADLY LASER

Back during the WOD, when Psilocybe Fanaticus used to advertise in High Times, he fruited a batch of mushrooms under UV light and damaged the genome that developed from the spores he harvested. Even generations later, albino mushrooms and mutants would develop from spores harvested from line that were fruited under UV light. He had to go back to his collection and start a new line that had never been exposed to UV in order to restabilize the genetics.

Isnt this light science?

Not even a metion about UV-A B or C there is a big difference.

I first learned about UV-C when watching BigClive on RU-vid. He was talking about sanitation lights during the pandemic. There was this accident where UV-C tubes were being marketed as black lights. They realized there was something off when the tubes had a blue-green light rather than a violet light, but they thought it looked cool. The came down with arc flash burns on the corneas. They recovered, but it's really unpleasant. I'm not sure why the security guard didn't have that problem. Was he wearing eyeglasses with glass lenses? The security guard should have sued because it was the lab's responsibility to tell him.

I am infertile from eating scented candles. The

What an awesome video to watch while I got pretty badly sunburned over the weekend.

But we need it for vit D production, and to avoid depression. Also human eye can see UV light (as faint blue-looking color), but most of it doesn't make it through the eye lens. just like everything else we deal with, you shouldn't over do it either way (100% avoiding it, or over exposure).

Never go in the sun ever. Got it!

I started working in HVAC and I always bring a big sun hat with side flaps, cooling arm sleeves (easier than lathering up my arms with sunscreen every two hours) and sunscreen for my face i bought in bulk.

I am a light bulb collector and my 2 favorite vintage bulbs are mercury vapor and fluorescent. I have several arc tubes out of both mercury vapor and metal halide lamps that the outer bulbs had been broken away on. These will still start and operate in this state, and since the quartz the arc tubes are made from (because it can handle the super high temperatures of the arc when in operation that can easily melt even Pyrex glass) this material is transparent to the full UV spectrum, which is absorbed by glass, hence these lamps having an outer glass bulb, and will cause eye irritation and damage, and skin burns if the outer glass bulb is broken. In rare cases, broken High Pressure Sodium lamps can do the same, as they contain mercury that emits UV and the ceramic arc tube is also at least partially transparent to UV. Halogen incandescent lamps are quartz and can as well, though a white hot tungsten filament emits far less UV than a mercury arc. These lamps can be a serious hazard if broken but still working! Also, clear fluorescent germicidal/ozone lamps are just as dangerous even though much dimmer than high intensity mercury and metal halide lamps missing the outer bulbs. I have these in a few sizes in my collection, and know they are dangerous as well! I used a 15 watt 18 inch diameter one I put inside of a clear acrylic tube I had cut to length that fits over the 1inch diameter T-8 germicidal fluorescent lamp to show the mercury arc that is in any fluorescent lamp but blocked from view by the phosphor to show what goes on inside these lamps. In just a few days of this demonstration, the short wave UV from this lamp cracked snd crazed badly! While it filtered out the UV making looking at it and being near it safe, the acrylic tube was destroyed. So UV is VERY nasty!! Sun lamps are either mercury vapor or fluorescent lamps with glass bulbs made of “Corex-D” glass, which is a mix of glass and quartz that can have various ratios of the 2 to provide the exact amount of a certain wavelength of UV, filtering out the more dangerous shorter wavelengths. Sperti made some portable sun lamps in the 1970’s that used a quartz mercury vapor arc tube and were causing severe UV burns because the entire spectrum was released! They were banned. Older ones used a corex-D low pressure arc tube tgat blocked the most dangerous wavelengths, much safer, but still capable of of causing UV burns. So while I collect these lamps, I am VERY aware of the dangers! Cheers!

This one hits close to me as I’ve been working under the sun for about 3 years now. Thank you

As a physics student this just felt like a photo-electric effect recap

Yet UV light is vital to our cellular processes, particularly bone and skin health. It’s a deadly dance we walk every day.

Years ago, due to many overexposures to the sun, my arm developed a melanoma, which my Dr. caught. I then had it removed by a dermatologist. He recommended that I either avoid sun exposure between 10 AM & 4 PM, or otherwise apply SPF 30+ sunscreen if I must go out then.

Always wear sunscreen/sunblock! ☀️

Did the guard not notice he was essentially getting sunburnt every night?

Onward to learning how to help my body fight with cancer cells. Thanks for the video, you are truthly amazing!

Always a good day when Dark Science uploads!

I've always preferred the Great Indoors. I'm told that I look young for my age, so that's a nice bonus.

New fear unlocked

that story at the end is absolutely horrifying to listen to. may he rest in peace, someone shoulda really told the guy before he started how dangerous UV light is. he also could've read the sign. just a tragedy all around the board.

this channel is so underrated

Woww, never imagined I'd understand cancer under 10 mins!! Thanks alot You earned a subscriber, I love these kinda information. Really grateful for this 🙏✨️❤️

That story at the end was crazy.

So we have to give up burgers & beer, wear sunscreen all day like a slimy frog, and stay out of direct sunlight for more than 15 minutes. Sounds quite doable.

“The sun is a deadly laser “

Not me watching this video the day before I leave for the beach for two weeks 💀

They did really bad job at making sure the new guy knows all the safety measures, then fired and in the end killed him, all that while peacefully cutting mice.

We use UV lights in air handling units for hospitals HVAC.

I've been thinking about this for a really long time thank you so much for this video!

so i made a UV glue hardner that i call the melanoma box because the inside is bright purple when its on

By far the best and simpliest explanation of electromagnetic spectrum.

In My travels , a friend would keep himself warm by standing in front of one of his AMPLITRONS , I WAS TERRIFIED WHENEVER I seen cabinets doors laying about wondering is he working on something, or just keeping warm .

RU-vid is a lonely place when you're not uploading. So pumped for this!

I'm melanated. I am protected

What about those at-home teeth whitening kits that include a UV light device that’s placed in the mouth?

Excellent explanation of the electrromagnetic light spectrum as well as UV radiation causing cancer!

Very good and informative video. Thanks for pointing out that alcohol causes cancer, because people are igonrant when it comes to their addiction.

Would've loved this kind of stuff back when I was doing my undergrad. Would've made the higher level bio courses easier to understand

I wish my family listened to me and wore more sunscreen ;(

hey man, these videos are the best because for me, if I don't understand the mechanism behind something I don't do it, so thanks to you I'll use sunscreen, love ya

Yes but germicidal lights are made to emit almost PURE high intensity uv-c. Would that be a uv-a/uv-b light, the security guard would just have been a tanned security guard.

Fascinating! Love these videos. Particularly, how these things actually work.

I love the way you explain things! Makes it easy to understand and remember. It is very interesting explaining how cancer works, do you plan on covering cancer as a ehole subject? Like, how are some compunds carcinogenic(such as Benzene) Why are some foods carcinogenic?

Why use dental curing light as an example of hardening adhesives? Dental curing light operates at 450-490 nM not in the UV spectrum for a reason. Dental adhesives are designed to cure in that wave length. It's a visible blue light. NOT UV. Use a curing box for 3d printing would be a better visual example.

What happen with other led lights, such as red, green, ..? Are they dangerous? They are being used for beauty skin.

When I was about 12 years old, my family went camping in Ensenada, Mexico on el faro beach. We are a family of addicts, to be frank, so naturally all the adults were drunk and us kids were blazing and sneaking beers. Basically what I’m getting at, nobody even thought about putting sun screen on me and I ended up with the most horrendously painful 2nd degree burn all over my back. I had so many blisters, I would cry in pain just from my mom putting aloe Vera on my back. It was one of the worst experiences of my life. So, fast forward to last year, I’m 34, at the dermatologist just for a little check up when she notices a weird looking mole on my back. They take a biopsy and call back a week or so later; Basal Cell Carcinoma. Just on a regular, normal day, no symptoms, no worries, just a simple check up and boom. Cancer. (I had thyroid cancer before too but don’t know what caused it) I told the doc about the bad sunburn I’d had 22 years ago and she said, “Yeah, that’ll do it.” Moral of the story is USE SUNSCREEN OR STAY OUT OF THE SUN! 🌞 It really hurts 😭

Having some welding experience,I knew UV could cause cancer, but never knew it was because of DNA damage. This should scare some of the welders that don't wear ppe Also cool to learn why UV is non ionizing, but higher energy spectrum lights do

Then how do people from Dying Light survive?

Thank you for passing this on. I happen to work with UV lights on rare occasions at work with micro soldering. I try my best to becareful & look away aiming the beam away from me & only directly on the device with the uv glue sealant.

Great video, you answered several of my questions about light and UV light. Thank you.

Me, sitting in my room with blacklight posters and lamp on: "I'm not going to regret clicking on this video at all!"

I love getting my nails done but now I worry about the UV exposure :(

How the hell did the Security Guard not realize the "UV Hazard" sign in the door FOR SEVERAL WEEKS.

When did this guy get almost a million subs? Jeez

A few years ago during a heatwave, I went out to see my then boyfriend. It was only a 20 minute walk through a park but I found that my right arm had been severely burnt and I assumed it was cuz of my pale complexion but hearing now that it’s recommended to only be in direct sunlight for 15 minutes, that now makes a lot of sense.

Just to mention, UV light also is in a wavelength range, so it gets divided into long and short wavelength (or near UV and far UV or, in marketing terms, UV-A, UV-B and UV-C). The kind of UV used for sterilization is usually UV-C, which is short wavelength, which in nature gets blocked entirely by the atmosphere, so we only get UV-B and UV-A. In the case of the guardian it was probably UV-C (although I've probably seen some UV-B lights, because UV-C glows in a pale blue and not violet for another reasons), so yeah, very damaging, but UV-A is "mostly" harmless in short periods of time and is the one used for hardening adhesives and resins because of the mentioned cross-linking nature and for most of the crime scenes investigation, but the thing is, UV-B which causes sunburns (and in very long exposures or for many years causes cancer) is also responsible for vitamin D synthesis in the body, so we need some UV light in our lives, just not a lot, so don't be worry of the sun, just get some protection when staying outside for long periods of time

Based af, people need to see this. Thank you🙂

I did photography in college. in my advanced class we got to do different types of development techniques. some of them were very old techniques that involved using the sun to develop photos - most often we used a method called cyanotyping. you use a solution with a special type of cyanide in it and it makes really beautiful blue (cyan) exposures. even though I am in Texas, this process can take 12 hours or even more using actual sun, so we had a sun lamp which was in its own special room. we had to wear protective gear because the lamp was so powerful that it could do in 10-15 minutes what it took the literal SUN to do over the span of 12 hours... it was a very expensive and powerful UV bulb. I can't imagine sitting under something like that and not realizing it was damaging you, though. maybe the lamp at your work was less powerful, but even 5 minutes exposed to the bulb at my school could leave you with bad sunburns.

Ultra Violet is Light on Ultra-Violence difficulty.

Nice. I always like a spicy vid from this channel. Better still, I *ALWAYS* like before I watch

I'm really liking these videos. Keep up the good work!

Masterpiece of video, amazing explanation, nice details and scientifically accurate but simple!

Bro never noticed the wicked sunburn he had after every nap ☠️

I’ve always wondered about how UV causes cancer… AWESOME VIDEO💪💪💪

Very good explanation! I enjoyed your video a lot.

This is one of those rare videos that just pulls a whole boatload of disparate facts in my head together in a mind blowingly simple way. I can't believe how clear a lot of these connections are now. Like WHY does UV disinfect? Oh crap, it's literally the same mechanism that gives me cancer! And WHY does UV give cancer but regular light doesn't, and why are X-rays so much more dangerous. I knew all this stuff individually but never thought about it all holistically. Great video.

"I discovered that the password I have been using ... is on the drakweb" 😂😂😂

Thanks for the educational video. I had a black light when I was younger in my bedroom and loved the way people's skin, eyes and hair looked under it when it was dark outside. Was this the same thing as a sterilization light? Also I see these blue lights in some public restrooms recently and now I'm wondering how much more powerful this uv light is than what gets through the ozone layer?

Would have been helpful to discuss the different types of UV and how the lower wavelength is more dangerous than the higher ones.

I use ultraviolet lamps to grow sprouts and plants that I transplant later and they are quite powerful and they made the skin on my arms a little dark since I usually wear short shirts, And the lamps, being at the height of my chest, make me look like a domino piece, so handle them carefully. These things can only tan you or burn your skin like a marshmallow next to a campfire.

9:40 Squamous and basal cell carcinoma is far more common than melanoma (in the millions per year compared to 200k per year.) Carcinoma occurs much more commonly on sun exposed areas like the face and arms and legs. Melanoma is a bit counterintuitive, it occurs irrespective of sun exposed location (like the example you show on the back) and is neutral to negatively correlated to sun exposure. (Likely due to the immune function pathways signaled by the increased vitamin D) Rates of melanoma have been increasing since the 70's even with ever decreasing amounts of sun exposure nationally.

Do UV flashlights you can buy anywhere, without any warning as far as I can tell, emitt this harmfull wavelength or do they have some kind of a filter or something to not be dangerous? As an example I found one with 365nm wavelength. Sorry if it's a stupid question, I'm not very knowledgeable on this subject.

I sometimes feel guilty for having been sent to a private school… And then I feel bad because so many people don't even remember the basic middle school intro to the electromagnetic spectrum. We certainly didn't have this level of detail in the 70s and 80s - my mom was a microbiologist when they were still figuring out the cell membrane; cracking DNA was still a few decades off - even so, we were given a basic diagram showing longer and shorter wavelengths of energy, part of which was visible light, but there was also infrared (heat) and x-rays, gamma rays and alpha particles from radioactivity, microwaves which can cook meat in minutes, and ultraviolet isn't that fierce, but we have to wear sunscreen or shades and try to minimize it? So it's in that "bucket" of energy waves that can toast you more or less, and the nastier ones are radioactive and can cause cancer. that's a very superficial way of describing it - your video explains the science. But having a general knowledge of science used to be an important part of the US curriculum, back during the Cold War. what a pity that cultural priority has been lost now that we know so much more. I'm sure this guy is one of many thousands who have died in ignorance of something that the last generation wouldn't have, for the most part.

Holy shit your channel needs more people, amazing video

Be interesting to understand how sun screen works.

Always make sure to stay protected when I go out into the sunlight. So I always wear a condom when I'm out😂😅

OK but who put the cancer ray right next to the light switch 🤦‍♂️

My wife used to laugh at me when she found out that I wear sunscreen year round, even during snow. We both us SPF 50 now and on our little boy.

why does RU-vid always take so long before reminding me that you posted, amazing video.

My family and I found out late last year that my younger sibling had skin cancer, likely due to not wearing sunscreen when she would go outside. Fortunately, it was noticed and diagnosed fairly early. They got her started on some treatments and she's all good now but it definitely scared me a lot to hear about. It's kinda funny in a weird way, she's a lot more prone to UV radiation than I am (she has blonde hair and blue eyes, and my hair and eyes are dark brown) and I've always been the one who's super up-tight about wearing sunscreen and proper protective clothes when going outside, whereas she couldn't care less

If I have an electric insect killer in my room that has two UV light tubes, is it hazardous to me?