UVLEN is a SCAM (It Violates the Laws of Physics) - Krazy Ken's Tech Talk
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- Опубликовано: 6 янв 2021
- This UVLEN scam promises to be your "digital" hand sanitizer, and it can help clean your hands with your phone's flashlight! The only problem… it violates the laws of physics; a blue light filter can’t convert an iPhone flashlight into far-UVC light. Oh, and watch part 2 next 🥲 • UVLEN Scam Follow-Up (...
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Krazy Ken's Tech Talk - UVLEN is a SCAM (It Violates the Laws of Physics)
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Stay tuned for part 2! 👍
And yes… thanks for some additional comments on wavelength conversion (like what laser pointers do). But I think we can all agree that is NOT what this thin piece of blue plastic is doing. We'll see how well it really works in the follow-up episode ; )
Can't wait for part 2! Notifs on.
You also could try a spectrum analysis on the light this thing is filtering just to show that there's no UV light in there
Great Video. I was wondering, would you be willing to do a video on the Bionic Gym. I have read some material suggesting it is a scam, but I would really like your input
@@Momi_V I would love to… but spectrometers are out of my price range. Maybe I'm overthinking it! Is there a cheaper tool I could use / rent?
@@ComputerClan sure, just use any fluorescent material which reacts to far UV
Preface: The product is undoubtedly a scam.
With that out of the way, there are ways to change the wavelength of a light with (something a bit like) a filter - an example of this is inside green laser diodes - they are actually an IR laser diode that pumps a special kind of crystal to emit green light which is shorter in wavelength than the IR source.
This product isn't an example of that, because it's a scam.
Love your channel as well!
Hey, Atomic Shrimp!
First screen protectors and now scam sanitisers, where to next mate.
Well said, and thank you for watching.
Love your channel atomic shrimp
"Technologies Inc."
These scammers are running out of names
How about 'Incorporated Tech.' ?
Scams Inc.
maybe it's so it's harder to find reviews of the company, as you'd find a bunch of other businesses that include "technologies" in their name when looking it up.
@@Managlyph i think so too. The reason why so many scammers using ambiguous generic names are so it is harder to track and find.
Can’t wait for “Phone by phone inc”
The real “backstory” is probably “2 people, John and Mark, worked at a hand sanitizer company. But their hand sanitizer had a serious flaw. It runs out so you have to buy more. John and Mark were seriously tired with the hand sanitizer company’s more grabbing practices, and they invented UVLen. An infinite hand sanitizer with your phone.”
more grabbing**
@@MCI_ oh my god this comment was a year ago
@@jasedxyz hi Jase
you mean "seriously tired with the hand sanitizer company's MORE grabbing practices" you gotta include the typo. For science.
😅😅😅
The money isn't the biggest issues. It's that people might trust this in place of washing or sanitising their hands properly.
This could lead to sickness or death
It's okay they are people willing to radiate themselves with ionizing energy frequently
@@anothrto1045 not everyone realizes that that’s an issue. These are the same people who ask you how to open a tab in chrome and ask you what you’re playing on your gameboy.
The interesting thing about all of this is that the majority of people these days
have no concept and knowledge of basic science, of course since that have
been deliberately dumbed down since 1970 by the indoctrination system, commonly
referred to as 'school'.
I learned these things almost 2000 years ago ... what you all would call the 50s ... 1971 years ago to be precise.
@@andrew_koala2974 something about sufficiently advanced science being indistinguishable from magic.
No wonder left these days. Follow the lines, don't irritate authority , follow syllabus to the letter but not a step further and what not being the lesson these days.
By that point, maybe we should let natural selection do its job.
This scam is so awful, there’s even a daily mail post in my country which talks about this as true science and doesn’t point out any of the issues in it.
Daily Mail you say? Or just casual daily news?
Because the daily mail is pretty shit tier
@@xCHEESEandHAMx daily mail yes, and it is luckily only them because they are utter trash
Your mistake was believing the Daily Mail is a "News Paper"
The daily mail is so full of shit that Wikipedia does not allow it to be a citation source.
It’s actually advertisement disguised as an article. Newspapers both good and bad have been allowing this for years.
next product: phone by Phone Inc.
Next product: apple by tree inc.
XD
Next product: Computer by Clan Inc.
@@CaseyQuotes COVID-19 V2 by COVID-19 V1 Inc.
@@pixeiatedsan5609 hehe by YT Battles inc.
"clinically tested"
doesn't mean it passed!
Ding ding!
Never trust anything that just says "Clinically Tested" without going any further. One of the big Obvious Red Flags of scam products, even without all the other big ones this product has :)
they went into their local clinic. Switched it on and off. "Yea, we tested it clinically."
Imagine if guns went through the process
@@shocknaw what's that supposed to mean?
@@shocknaw???
The biggest irony of this product is that your hands would be dirty when sliding the filter, ie even if it works your hands will be dirty again the moment you swap hands or close it
Not to mention you're handling your PHONE, something you always touch throughout the day after interacting with your environment. Imagine using your phone, likely the least sanitary item you have on your person, to sanitize your hands!
Is the saleswomen wearing an oversizes mans dressshirt, so it sorta looks like a scientists lab coat?
I think that she is supposed to be a sales scientist.
@@TheRealFobican Those two things should never cross paths but alas, they sadly have, and the world hasn't been the same since.
@@BewareTheLilyOfTheValley I had to make it work somehow together.
@@TheRealFobican she is just a model girl
@@bediosoro7786 it was a joke, perhaps a little too good.
There are actually crystals that are used in lasers to combine two photons into one photon of double the wavelength.
Usually a green laser pointer is actually an IR laser diode with a crystal that turns IR into green light.
Those crystals are very expensive, and they don't break the laws of physics.
But that doesn't mean that this ripoff uses this kind of technology, as far as it looks, their product is only some blue tinted transparent plastic placebo crap that can't sanitise anything.
the cheaper crystals are not as expensive, you can even crow some at home, but you need a laser for them to work, so yea its this product doesn't work
@@zweiblali3410 why à laser ? The only thing special about laser light is that it has all its energy at one frequency.
I already typed up the physics explanation to it and you beat me to the example… but since I have it:
I can’t find fitting literature, so you have to do with my explanation (If there is someone with a better background in laser physics than me, please link something…) (And this will be very much simplified, and I hope that it will be understandable without a degree in physics.)
Light can be described as a particle called a photon. The photon has a certain energy. A photon representing light of UV wavelength of 340nm has an energy of 3.6eV a photon with 220nm has 5.64eV. When light reacts with any material it reacts with its atoms. This means the atom it self absorbs the energy of the photon. Atom plus UV photon gives you an atom with an energy plus 3.6eV.
Now it is possible for an atom to absorb two atoms at the same time. (This called two-photon absorption. You can find that on Wikipedia.) So you have an atom plus two UV-photons. You have an Atom plus 2x3.6eV=7.2eV. In theory this atom can emit the energy directly back as light. It can do it like it received it in 2 photons or it can do it as a single photon. If it would do it as a single photon this photon would have an energy of 7.2eV (and a wavelength of ~170nm).
In the real world this is much more complicated. A material absorbing two photons at the same time has a certain chance, and it is quite unlikely. It gets more likely if you shine more light on it. So laser would come in handy. You will not get that with an LED from a smartphone. And than it needs to emit the photon back with the higher wavelength, and that is even less likely.
I know that there is some research done on this topic. Mostly involving fancy materials with certain behaviors making the stuff I described more likely. And high power lasers.
How about phosphors in a florescent lamp? Don't they become excited by the photon energy then emit their own photons, thus convert light of one wavelength into another (white light)?
@@datachu Yes they do but from a higher energy to a lower energy, fluorescent bulbs I think make UV light and the phosphor converts this to white light. The difficulty arises when you want to go from low energy photons (e.g. visible light) to high energy photons (e.g. UV light)
Well, nonlinear optics and 2nd harmonic generation is a thing. Just need to put ultrafast laser with enough power in the phone 😅
Wanted to comment exactly this. Frequency doubler crystals exist that convert IR to green light for lasers. But yeah you do need a laser 😅.
Obviously a scam but... Theoretically you could also focus non collimated light onto a blackbody emitter, heating it to a high temperature, & use a selectively reflective mirror to reflect back low freq. light, and allow high freq. (UV) light through. Pretty inefficient though, because while blackbody radiation is broad spectrum, UV always makes up a small portion of it. Inefficient and clunky, but technically passive up-conversion of frequency without messing around with frequency doubling materials and lasers.
I have a laser in my phone. If I buy this filter and turn it on and off fast enough, will it work..?
@@Wassermelonenbaum Can you turn it on and off 10^14 times a second?
@@benjaminmiller3620 I can turn it on and off 10 times in 14 seconds..
Imagine if the filter really did work, and you left your phone flashlight on in your pocket with the filter engaged. It could literally burn your skin severely. It’s a blessing that this POS DOESN’T work.
Hang on, according to their marketing, if you just have your phone flashlight on anyway without a filter, it's a giant UV death Ray? What?
If you used UV light on your skin without protection on your skin you could damage it alot and maybe even get skin cancer, if you looked at the UV light you could get blind.
@@kosmas173 Yes, but that's with an actual UV light. They're saying as though the light on your phone is safe so long as you use their filter, weirdly implying that your phone, which most definitely is not UV, is unsafe witbout that filter. But let us not break our brains trying to make sense of these scammers.
At the beginning of this pandemic I hoped to make a fortune with UVLEDs making little hand sanitizer lights. They do have LEDs which emit the required wavelengths (often used in curing resin) but the problem(s) are a combination of physics and biology. If the intensity is high enough for effective sanitization then repeated use leads to skin damage.
Yes a real one will blind you
@@AgentOffice The real ones have the UV light source hidden inside, and they just sanitize the air they suck through.
I built one myself in 2020, with a 75W UV discharge lamp inside and 3D-primted ventilation grilles which kept the UV light away from me. Yes, I took care to use a lamp which doesn't produce ozone.
Yes, there are some devices who emit the UV light straight away, and which do produce ozone. These are meant to sanitize room where no human or animal is inside.
I live for the day when one of these companies try to sue you for defamation and get decked by the court system.
"This is a technology channel, not a physics channel, so I won't be getting into details"
Technology Connections would like to disagree 😂
Cue the song from Technology Connections' outro
I just want to point out that changing visible light to uv is possible, using up-conversion phosphor doped with the right elements. But i doubt they actually did this and it is and will be a scam
@@greenmaillink On Hold Smooth Jazz intensifies as you try to reach UVLEN customer service on the phone...
@Clash Clan Technology connections is the only youtue channel that made me mad at my microwave. And my toaster.
*_"Can you sanitize your hands with BROWN light?"_*
I always enjoy your videos, but I especially want to commend you for this one, for two reasons:
1. Instead of only mocking UVLAN, you gave a scientific explanation of why their product is a scam
2. You FACT-CHECKED with experts to make sure you were presenting your ideas accurately.
Great job, and thank you.
I know that white LEDs do emit a fair amount of UV (though probably not in that range), because I've watched theatrical LED lights to make actor's hair glow (from brightening agents in their shampoo). But filtering out the visible light wouldn't increase the amount of UV light, it could only attenuate it. So, if it was there in the first place, shining the light without the filter would be more effective than with the filter.
I am in awe at how hard he slammed his head into the desk.
Ye, that must've hurt
“I’m gonna type that into my Tech Speak Translator”
Your TST is a C64. Nice.
Thought it looked a bit familiar, I like watching channels that talk about old gaming consoles and computers.
@@BewareTheLilyOfTheValley Same.
I own a C64 as well, so it stuck out immediately
Hi Ken,
Actually in nonlinear optics there is something called "frequency doubling" which allows halving the wavelength. This is often used with IR lasers to create green laserpointers (which makes them very dangerous if the IR is not properly filtered out). en.wikipedia.org/wiki/Second-harmonic_generation
It's still obvious that this is a scam, but just thought you'd like to know
That is true, but even if they'd do that, the output of this process is so low the resulting UV would be negligible.
Yes, was about to comment the same, shockingly from what I remember, there's yet another quantum process that increases frequency.
lol. That’s exactly what I just wanted to write.
1:55
Dio?
Disinfects with UV light?
I’m seeing a trend here...
Nani
This UVLEN thing could actually just have been sold as a thing to put over your flash to change its colour just for fun. Actually still could have sold it for $15 and made more money by being able to include a much younger target audience. Smart move 😆 I’ve been binge watching your content as of late - seriously entertaining 👍
I think it exists and you can buy it on AliExpress, actually I think the scammers just bought a bulk of purple coloured filters and just said "it's purple so it has to be UV we can sell it"
"I went ahead and bought one!!!" Ken you krazy bastard!
In the interests of scientific clarity, presumably for the gadget starved geeks among us (who aren't stupid enough to fall for this garbage - so the company producing this has every chance of losing a lot of money)
Watch the UV “Filter” actually make his hands grow fungus and mold
The first Video I‘ve watched from you. I love your style, content and quality! You’re a gem!
I’d like to add that you don’t actually need 222 nm for disinfection, in fact 265 nm is the most efficient wavelength, and the most used source of UVC, mercury vapor lamps, emits at 254 nm. Also, UVC isn’t as dangerous as you’d think, because it’s strongly absorbed by the outer layer of dead skin and the cornea before it can affect live cells or the retina. It can, however, cause painful corneal burns, so better avoid exposure if possible. And while there are some processes that could indeed increase the frequency of light, I don’t think any of them are viable for this application, let alone at that price point.
Another shopify-store with scam items, what a surprise.
kylie cosmetics and heinz run on shopify lol. sure plenty of scam sites run on the platform too, but that's just because it's easy to get a shopify store up and running. doesn't really have much to do with shopify themselves.
Shopify is pretty legit... The problem is that their tool is just so easy, scammer could make them in no time.
@@user-fw1bq3gd4x But the thing is, Shopify should be doing a better job at moderating their stores and terminating any stores that are selling obvious scam products.
@@WillOnSomething fair. as someone who works at shopify, i'll tell you they take fraud like this pretty seriously but it's not like every store is manually checked before it goes live. in a case like this, they can't be making medical claims without proof, so they'll be kicked off the shopify payments gateway and have to look somewhere else. i personally deal with merchants who were shut down for fraud on a daily basis
*soulja game flashbacks*
Krazy Ken: ULVEN is a SCAM!
Me: My brain produces THC, but not enough to get HIGH!
Pass da sh*t!! Puff puff pass!!
@@SpartanX360 lmao,
Thank you. I keep seeing scam health and sanitizing products all this past year. All these companies are popping out of nowhere to run off with your money.
Why is everything advertised on RUclips a SCAM? If its on RUclips, I am not interested!
Frequency doubler crystals do exist. I doubt they're used here, but changing the wavelength to get shorter is absolutely possible, you just combine two photons with low energy into one with high energy. Again, probably not what's going on with this product.
👉👈
There are actually dopants which can cause a thin coating to do practically the same thing as the crystal used in the lasers. However you don’t just get half the photons at double the energy the medium you are using has to be excited by the light hitting it.
Therefore the more intense the light on one bit of the material the more UVC it will emit per photon of visual light:
the molecules stay pumped up to an excited state for longer because enough energy is coming in to keep them that way if an individual molecule doesn’t get quite enough energy quickly enough the energy will be converted to heat etc.
The keywords to search seem to be UVC up conversion
nsf.gov/awardsearch/showAward?AWD_ID=1033866
The award site has a list of recent publications based on the “nanocrystal” method
My brain and physics just do not get along, but what you described sounds like the pinned comment from Atomic Shrimp at the top of this video. I feel smarter being surrounded by other smart people, lol.
The important thing is that no physical laws are violated. It's still not practical, but it's entirely possible to change the wavelength of light in both directions, higher and lower frequency.
@@glenecollins I'm pretty sure the efficiency you'd get from converting the light from the smartphone flashlight to UVC would be laughable. Upconversion with a specific wavelength which is done in many green laser pointers is overall pretty efficient, as is downconversion from i.e. blue light as it is done in white LEDs and many laser projectors also. My point was only that there is no violation of physical laws. It's just not practical, and of course, the product is still a scam, as are many UVA desinfection products.
What about that insurance company that keeps advertising on youtube that looks SUPER sus xP
Edit: the one i keep thinking of is “Otter”
I turned off targeted advertising and now nearly EVERY ad I get on RUclips looks suspicious and shady af.
Yeah I think one of them is otter insurance.
@@lanaslay2163 I GOT ADS FOR OTTER INSURANCE SO MANY TIMES!
That doesn't really narrow it down too much, does it?
@@KrishnaDasLessons YES OTTER THATS THE ONE THAT LOOKS SUPER SUS MY FAVORITE is “this is what my buddy is paying..” me: why isnt he telling me then?
Also how every single add is word for word the same SUPER SKETCH
This is my first video I’ve seen on this channel and I’ve subscribed, great info and brilliant host!
1:10 May i have croutons and a light vinaigrette dressing on that word salad?
It violates the laws of physics? Someone call the physics police!
🚓🚓🚓🚓🚓🚓
0:08 When you get scam RUclips adverts
When you get adverts in general
@5:15 Actually, one thought that comes to mind is to use something vaguely akin to Glow-Mite. Basically, some kind of material that, once hit with light, absorbs it, then emits UV light.
I'm unsure if any material actually does this, but it's at least not directly against the laws of physics.
Hi Ken, you have one of the best channel out there. Your neutrality is amazing, so is your sense of humour. You provide a huge amount of detail on every products and well demonstrated. Keep it up. Cheers!
You thought it was a bio-sheet converter, but it was me, DIO!
me, whos never seen a jojo episode in my life:
*insert uncomfortable monkey meme*
expected jojo
even speedwagon is afraid
"UV" camera flashlight goes muda muda muda
I did not expect this JoJo. Even after I read DIO.
I love these dumb products being exposed because it's so interesting.
thats true lol
Just found the channel, im hooked on this series
Dude I’m not going to lie. The way you faceplanted that desktop got an instant subscribe from me 🤣👍
When you get here so fast that nobody has finished the video without skipping when you first see it and also 552 views in 5 mins!
1:57 DIO converter: "so you're approaching me?"
ZAWURDO
I just got an ad on Facebook for them
I just immediately linked this video so people won’t think it’s actually a real thing
Dichroic mirrors are so cool, unlike a normal filter where any other wavelength is just absorbed and only the desired one passes through, dichroic mirrors essentially split the light, so the correct wavelength passes through and the rest is reflected (hence they're usually placed at right angles to the beam)
Great as always. I work in lighting design/manufacturing and you got a lot right. Good job. Regarding consumer grade UVC light it is all snake oil. Good job man
Technologies Inc. is a good brand /s
Yeah
Hot
I buy all my Technology from Technologies Inc.
now we can take disinfected selfies!
@4:24 It IS possible for light interfacing with certain materials to cause a frequency shift up, but it looses intensity when this happens, as it does with specific mediums for producing certain laser light [although these are not typically referred to as a filter], however a frequency shift down is more common [and easier] as experienced with simple additives in detergents that leave residue on clothing that changes UV light into visible light to make clothes look brighter. But it is unlikely that they would use such exotic materials due to material and manufacturing costs.
Maybe as part of this test should order those cards that react to UV light.
Couldn't it theoretically have a frequency doubling crystal (like used in green lasers)?
Yeah, but those things are very expensive.
@@soorkie cant be that expensive there used in £1 lazer pens
@@snowwsquire just invert the position of the crystals
Anything like that that did work would at best cost 100× more than your phone, if at all possible
You should also check for the light spectrum. You can easily make a spectrograph using a camera a piece of a cd placed 45degrees and a black box with a small cut..
There used to be, and I think there still is, a product called phone soap. You would put your phone in this case thing, and then, press a button which will start feeding ultraviolet lighting to your phone, basically killing any bacteria on it.
There is actually a way to either decrease or increase the wavelength of a light using a technique called down conversion or up conversion, respectively. They use special materials to do this. The UVLEN probably doesn’t do this, as there are a lot of limitations of this technology (and they also said they used some bogus filter on their website). Also the information they put on their website is utter trash. Nice Commodore also haha.
Fluorescent lights?
Is it a VIC20 or C64 tho?
@@jaypaans3471 To my knowledge, fluorescent lighting tubes are made to produce specific types of light, they produce that light through electrical arc-ing through various gasses. Some florescent lighting tubes filter out light frequencies that aren't required by having a coating on the inside too. The 'filter' and even the tiny bit of actual science absurdly referenced in the advertising blurb of this product have nothing to do with florescent tube technology. The flash light on a smartphone isn't a fluorescent tube or even a Laser light emitter. It's just a high intensity LED.
@@penfold7800 fluorescent light gas discharge create UV light, and some minor blue/pink glow. It makes very little visible light, so filters are useless here.
The fluorescent layer _converts_ it into _many_ lower wavelength lights.
The high power white LEDs are very similar: the LED makes blue or low UV-A light, and the fluorescent paint converts into visible light.
LEDs are far superior because they can create the light with much higher efficiency, and they are designed to make a light the best wavelength for the fluorescent layer. (gas discharge is very limited in frequency choices)
The result is that the spectrum of CFL light is discontinuous and can make things look ugly. But modern (not cheap) white LEDs have practically continuous spectrum and very good color rendering.
(and simple LEDs can be turned into lasers if you put them into a tuned optical cavity resonator, a good example are VCSELs, but generally you do not want laser light because the cavity lowers the efficiency)
a similar thing is achieved in dpss lasers, if u habe a green laser pointer laying around im 90% sure its a dpss one, it has a ir laser diode in it whose outputs wavelength gets doubled and then halfed with a series of crystals (nd:yvo4, ktp etc ) and the end result is 532nm green light generated from 808nm ir laser diode, chk out "styropyros" channel.for more info about lasers and other stuff
1 view, 1 like, 3 comments. Is RUclips drunk again? Also, give us SpoofOS Pains!
i was here at 14 views and... 24 likes?
@@RealmyTheMan nice.
Lol
Yes, it is due to what is called, "a race condition". Basically it's because many computers are processing views at the same time... Here is a more in depth description of how this happens: ruclips.net/video/RY_2gElt3SA/видео.html by Tom Scott
@@RiverMersey I know this. It's just funny so I point it out.
Besides the fact that if those long wave UV’s were couched in the light coming out of the phone, it would be there whether the visible light was filtered out or not.
You were almost right here, the frequency is constant, but the wavelength isnt, still doesn't allow for the conversion they talk about. Just thought I'd put that out there
Dude, I actually saw a blaux "air conditioner" at a thrift store once.
What does blaux mean?
wow ig ur new here
this is slowly turning into the science clan... and I’m okay with that
First time watching one of your videos. I'm subscribing to this amazing channel!!
Getting a different colour light from another, passively, is possible using phosphors. This is how white LED's work, they're actually blue LED's coated with a phosphor which emits something roughly approximating white light. We do now have UVC emitting phosphors, however I have no idea if UVLEN is using them.
So you're saying that a piece of purple plastic won't turn my phone into a medical disinfecting device?
Color me surprised!
"piece of purple plastic"
"color me surprised"
Nice
Now that’s hilarious. Right after I posted a comment and continued watching the video he said the same thing I just did
Can a smartphone have a backup power source it can tap into while swapping the battery that will prevent the interruption of operation? In other words, could you swap the battery without the phone being turned off or losing power?
Bout time for the class to take action !
How to convert visible light into UV without adding any additional energy: Run UV bulb off a solar panel.
That’s actually legit idea. But if for light from phone flashlight is probably not powerful enough to light up solar cell for UV LED to be useful.
:brain:
@@illuminalist Well... it might work if you use capacitors to built up power, then pulse the UV LED...
the LED wouldn't be bright enough but still, Progress!
UV Lamp powered by phone USB?
yea, it's not impossible like he claims. some molecules can absorb certain wavelengths and re-emit others. it's just that, to do this, the light needs to be absorbed. so the filter wouldn't be see through, and the new light would be scattered in every direction
Damn he didn't even try to slow that face desk hit
I’ve never heard of something this insane before. Glad I subscribed and can LOL at this 🤣
some elements has "fluorescence" properties which can allow it to reflect/emit light in different wavelength than the inlet wavelength. like phosphorus used in CFL bulb
It gives me pain. Like physical pain. Please help me.
Ken, my B.S. Detector won't shut up. How do you shut up B.S. Detectors?
Fight BS with BS
I see you're a PKCELL connoisseur as well
@@FoggyNBS aww, my pkcell
They must be EMBRACED!
i just love that part when he got the translation for the bullsh*t sentece, it got me laughing
Love the old Clamshell MacBook in the background and the Newton Pad
you can use a crystal to fuse 2 photons together and double the wavelength. it will split the amount of light in half though. put that in front of a 444nm filter and it would work maybe
This is from the country where people think running a fan while the windows are open will cause your soul to get sucked out.
Yeah I have heard about this there are even fans with timers specifically for this purpose it's dumb
It's just a way for people to ignore suicide rates
God I need you at work with me. Took me months of explaining wavelength frequencies and intensities for effective methacrylate setting in dental composites. Seems nobody knew the difference between mW/cm^2 and nm. Attenuation of frequency and intensity is also something that is never discussed but is incredibly vital
Recently i saw a movie (or TV show) where the characters "make a portable UV light" by taping a filter to the phone flash light.
Well considering that we had to tell a whole generation not to eat Tide pods I think they will fall for anything LOL
Just like we have to keep telling an entire generation that wearing a mask will not impede their breathing and will protect against the coronavirus. Some people will believe anything they see on Facebook.
You're doing the Lord's work, Krazy Ken. Calling people out on their scams NEEDS to happen, and you're helping people by doing it. Please don't stop.
OMG... the stupidity of certain people fall in this INSANITY... higher and higher at this times of total MADNESS in this planet.
It’s funny. At the end of your video is an add for the mighty $4000 skyquad drone. 🤣🤣🤣🤣😂😂🤣
Actually, products like Katadyn's Steripen is an almost every day application of UV light for disinfection.
It takes hours of exposure for uv light to kill a corona virus............
ironically, this was released during my middle school science class
How is that Irony?
This reminds me of when I told my mother-in-law I could reheat her fries with my phone. She watched with great interest for a few seconds while I cycled the torch on and off.
Rewatching because I forgot about this and am confused as to what it is but he’s announced via the community posts that part 2 is coming.
Hey guys, i'm pretty convinced that this looks like a scam. But there is a bit about the physics that i remembered. There is a way to passively create a higher frequency of light. The process is called second-harmonic generation. en.wikipedia.org/wiki/Second-harmonic_generation There you can shine a light through a crystal and double the frequency (or halve the wavelength) and create higher energy photons. I have no idea if this product works that way and you need a crystal, tuned to the incoming frequency but it is not impossible. Another important fact is that using this method you loose a lot of energy (here number of photons) so if uv rays are created it surely wount be much and probably not enougt for effective desinfection. Maybe someone can look into this and it may be interesting for a follow-up video.
lol i actually bought few last week from my local pharmacy ( more expensive tho >.< )
It does actually work, you can feel some funny tingling sensation in the hand. Tho I only use it with my phone flashlight... I sniff the uvlen and kinda smells weird after using it and it gets very hot :/
That tingling sensation is a special process called "the placebo effect." Very powerful!
Really someone gets scammed with these things! I think I have to start taking advantage of all this fools that are around!
There's three main types of filters: band-pass filters that allow light between a range of frequencies to pass, low-pass filters that allow frequencies below a certain frequency to pass, and high-pass filters that allow frequencies above a certain frequency to pass. This could be a high-pass filter but if you can see light through it, then it's nowhere near UV-C. Even it was for UV-C, the light won't produce the proper frequency light anyways.
You could test if it emits any UV by shining it onto some vaseline glass (uranium glass), which can be bought on ebay quite easily.
Some higher-end public toilets and most of MacDonald's; in restaurant W.C's. in the UK have combi hot air fan and UV light projection hand driers and sanitizers.
forgive my ignorance. but if you cant decrease the nanometers, then how to Diode-pumped solid-state lasers work?
ken: i feel better already
also ken: *casually dies*
Can't wait for the UVLEN x-ray filter app so I can check to see if my finger is broken or not.
Just got a starscope ad at the end of your fraud products video... The irony!!
You can buy cheap ultraviolet flashlights on Amazon. As part of your test it might be interesting to see whether these have any germicidal qualities versus placebo versus UVLEN.
you can change frequencies with materials that fluoresce. looking forward to this one.
Indeed, but thanks to thermodynamics, that usually only works in the other direction. Like how the love stains left on your car's upholstery by a has-been TV star will absorb near-UV light and emit violet light.