I can't resist making a comment about your vacuum chamber. I always enjoy when it shows up in your videos, and it definitely was the tool that propelled your channel in the first years!

@Kidderrgaming

Жыл бұрын

This. I was writing my own comment about the same thing then noticed xD

@HunterHogan

Жыл бұрын

Similar to "The Hydraulic Press Channel," alternative names for your channel include: The Vacuum Chamber Channel The Vacuum Action Lab The Vacuum Chamber Lab Action Lab's _Will It Vacuum?_

@jafinch78

Жыл бұрын

I can't resist making a comment about Les' Lab latest video literally shows how he made a "DIY Supercontinuum Laser! The Ultimate White Light Laser!" Neat timing for some neat systems.

@orvinal2883

Жыл бұрын

It was actually the hydraulic press. The channel used to be called hydraulic press action but he started doing too many other things and got more popular so he changed his name

@gpeterpete870

Жыл бұрын

That's what made me subscribe to this channel. I was like this guy is serious

I highly respect you doing these experiments and reporting them. Keep up the good work.

@vishals7433

Жыл бұрын

much useful than verisatium.

@ShlokParab

Жыл бұрын

@@vishals7433 Veritasium videos are based on diverse topics and they also have more funding.

@Hexation

Жыл бұрын

@@vishals7433 They make pretty different kinds of videos, sisisndofnfff

@Hexation

Жыл бұрын

Did F

@OshineTheOranguTANK

Жыл бұрын

@@vishals7433 More useful? Almost all his videos are just random "experiments" with facts unrelated to anything stretched out into 8 minutes to generate the most ad revenue.

the spectrum looks like black body radiation, perhaps the infrared is turning into thermal phonons on the graphite surface

@gorog15

Жыл бұрын

It is graphite pigment or some kind of nanocrystal pigment ?

@1234567890CAB

Жыл бұрын

@@gorog15 It's most likely carbon black and graphite is a form of carbon

@notyrpapa

Жыл бұрын

I was also wondering, as a physics n00b, while watching that section why it couldn’t be black body radiation. That would explain the full spectrum. And Occam’s razor says that the simplest explanation is likely to be the right one… But this is an interesting way of talking about the other phenomenon nonetheless.

@dirkeisinger4355

Жыл бұрын

And only works in vacuum since the heat gets transported away by convection too quickly without it

@robotnikkkk001

Жыл бұрын

=EXACTLY IT WAS BLACK BODY RADIATION,AND IT DOESNT GIVE A HELL ABOUT WAVELENGTH ...................................

There is one thing I now know: I need a vacuum chamber.

@westonding8953

Жыл бұрын

He sells a mini version on his website.

Send this guy a new radiometer!

When you said that you weren’t sure what was going on, and that’s why you’re posting a video to get our thoughts, I was thinking of posting “Black Body Radiator?” Turned out to be the case as you kept pushing to figure it out. I love your videos! Thanks for all the hard (but fun) work!

the part where the light was confirmed to be white by using the diffraction grating was kind of genius

@ShlokParab

Жыл бұрын

You can't win a debate against a physicist, especially if he is actually right; physicists always find a way to prove their statement.

@theflickerfrontier

Жыл бұрын

@teasureofeverything5707 subscribe it please😁

@westonding8953

Жыл бұрын

Yes. Truly.

@jafinch78

Жыл бұрын

What would be sweet would be using a cost effective spectrometer like a good channel that can use more funding and support, Les' Lab. He's even provided open source software for some of his videos projects that are mostly cost effective and smart stuff too. His latest video literal was "DIY Supercontinuum Laser! The Ultimate White Light Laser!" and is worth checking out since a lot of more serious DIY projects that might cost a little more, though neat if you get into.

I always wondered why the laser card would get saturated (or I guess unsaturated).

I feel like I would have bought a new radiometer and made sure it works just as good as the old one before I smashed the old one. Sometimes new things don't work as well as the old ones did!

@nonothebot

Жыл бұрын

Right !

@joemyers5302

Жыл бұрын

Or buy a new one to smash.

@michaelripley4528

Жыл бұрын

Yeah Old times they made stuff to last 👌🏻

@guycha0s380

Жыл бұрын

Yeah

@blueblue9410

Жыл бұрын

Wow that's some wisdom

I really love the way this one was presented. Felt like you discovered something then through experimentation, figured out what the cause was. Like watching science happen, rather than being told how science happens. Nice job :)

I know this will probably get lost in the comments but sometimes when I’m home alone I like to go out in my garden and cover myself with dirt and pretend I’m a carrot.

@Oofed.

Жыл бұрын

What

@mrpoopy7yearsago474

Жыл бұрын

Heh?

@rundownpotion

Жыл бұрын

Keep going king😥 Edit: just found out from alot of replies that this comment is just a copy from other comment sections in other videos... this really is a bummer as i thought this was an original and that it deserved recognition, i was wrong, so i would like to change my reply to the following: please *don't* keep going because you're no king and you will never be one by copying others and leaching off of others success. Thanks for reading...

@Leveronicus

Жыл бұрын

We will make sure this is not lost.

@smexy65

Жыл бұрын

I do that too but naked.

I really admire the fact that you left all the parts where you weren't sure about the explanation, even though at the end you could have just edited it all up with the results and upload a video where you "know everything" - this really shows your scientific spirit!!!

I’m a scientist with a Master’s degree in organic chemistry. I find this guy much better than I could ever hope to be. Keep it up Action Lab.

@CM-mo7mv

Жыл бұрын

wow that's a statement... 🙃

@jurginschuhardt4858

Жыл бұрын

Can you explain everything that happened in this video

@jafinch78

Жыл бұрын

Supercontinuum in Multimode Fiber is Les' Lab latest and worth of watch. Great detail and amazing output!

@tatianaes3354

9 ай бұрын

The Action Lab guy is a Ph D in chemistry engineering, so he knows stuff

The second you said you shouldn't be able to increase the the frequency I immediately thought how the hell does a green laser pointer work then! I'm so glad you answered that.

@thisiswhereidied3054

Жыл бұрын

I mean green laser pointer just emits green light? I'm missing something here?

@TestEric

Жыл бұрын

@@thisiswhereidied3054 Standard 532nm green laser pointers are actually IR lasers that go through the frequency doubling crystal to emit green. You can buy lasers that do directly output green light however.

@thisiswhereidied3054

Жыл бұрын

@@TestEric that's what I thought I was missing lol i can wrap my head around EM spectrum but how tf insides of a laser pointer work is magic to me, it's reasonable how prisms split light into its components but how a pice of crystal can just double it's frequency? You could make a very bad computer with lasers then, at least a few logic gates on the top of my head

@TestEric

Жыл бұрын

@@thisiswhereidied3054 It's as close to magic as possible. The quantum effects that explain why a laser even works melts my mind.

@thisiswhereidied3054

Жыл бұрын

@@TestEric i like to think i have some basic grasp of quantum mechanics, i know how those particles act, have no idea why they do what they do, but have doubts anyone understands why they do what they do lol

Hey Action Lab, thx for all the good content. Always curious many times surprising! Have a nice holiday and keep up the good work! You are an inspiration for many!

Hi Action Lab, Nice video and demonstration of that effect. I'm an engineer specialized into organic and bio chemistry and I know a lot about chemistry and science, but less about specific aspects of physics. I had an idea about your experiment but I had to first check onto wikipedia what they say about Black body and Stokes-Raman. I found that wikipedia under Black body states litteraly into the chapter "Near-black materials" that: "They also have application as solar energy collectors, and infrared thermal detectors. As a perfect emitter of radiation, a hot material with black body behavior would create an efficient infrared heater, particularly in space or in a vacuum where convective heating is unavailable." So this is precisely what you displayed :o) Your IR laser hits the target (black or white; with black being a better absorbant and less direct reflection emitter than white); because it is under vaccuum (partial or near total), it will limit convective heating (and/or cooling) by surrounding gas molecules; so the heating happens into the spot shined by the laser beam; then it increases with the time of exposure (observed by the glow seen into your video between 3:49 and 4:12; that passes from orange to yellow to bight yellow-white); the ray then heats up the coating (sometimes with smoke) and the metal underneath; the molecular agitation into the solids then dissipates it thermaly into the metal radialy and concentricaly to the beam spot; then only radiative emission of the black body can be observed (as if your spot was a white source of light (like the Sun, like old bulbs of carbon or tungsten (W) filament heated by their resistivity under the passage of current through it) and it display the all wavelenght (color) spectrum of those (of course the light re-emitted is So by activating the spot, the light takes some time to get ful emission intensity (ta); and conversely it should do the same, when the light is closed; the spot should glow darker by passing subsequently to lower wavelengts (yellow, orange, red, infrared (heat)) and this takes a little, but stil finite time (te). This in principle should be observable with a spectroscope with a dynamic of extinction caracterized by a more and more prononced red shift and IR (from blue to red - to the right); the enlighting fase would go counterwise of course with an increasing blue shift (from red to blue - to the left); lets say a "full color spectrum sunset". --------------------------------- Now regarding your cristal doubling frequence; it doesn't contradict the principle of emitted frequency is usually A bit what happens with a tide of water made of molecules with an average energy level; but when hitting a surface perpendicular to it; some droplets of it can go much higher than the tide height. Probably that in a near future some other cristals with such rare effects will be discovered or rendered public... (see for example below anti-Stokes shift). There are other cases where the frequency rule doesn't seems to hold: 1) When looking at Raman spectrum; it looks as if shining a laser frequency onto something makes 3 types of rays; a) direct reflection or scatering at the same wavelengt as initial b)Stokes shift (red shift) that kind of gives a finger print of the molecules (kind of fluorescence type) thus lower frequency is emitted than the incident excitation frequency. c)anti-Strokes shift (blue shift) that also provides info onto the enlighted molecules. As a matter of facts a) >>> b) >> c) (c is a very very rare event statistically) So "b" needs very strong filters to cut off "a" (and "c" will need even more efficient filters because its intensity is very low) Int(a) >>> Int(b) >> Int(c) Wikipedia states under Stockes shift: "Anti-Stokes shift If the emitted photon has more energy than the absorbed photon, the energy difference is called an anti-Stokes shift; this extra energy comes from dissipation of thermal phonons in a crystal lattice, cooling the crystal in the process. Yttrium oxysulfide doped with gadolinium oxysulfide is a common industrial anti-Stokes pigment, absorbing in the near-infrared and emitting in the visible region of the spectrum. Photon upconversion is another anti-Stokes process. 2) The famous effect of relative to each other speed of emitting source and observer; the Doppler effect... very observable with sound, but also with red or blue shifts of galaxies. So approching galaxies (source arrive towards observer) or if we come closer (observer approches source) (or if both reduce their distance towards each other) will produce a blue shift that may look like frequency is higher than it should if everything was still and not moving at all. Regards PHZ (PHILOU Zrealone from the Science Madness forum)

As an optics enthusiast, I feel amazed by this experiment. You rock! Thank you.

As an optician, it was incredible for me to see white light from an IR laser. Thank you so much for the explanation - this is a very interesting effect that can be used somewhere.

Would love to see how much heat is left in the black part of the radiometer with an IR meter

@Warhawk76

Жыл бұрын

Or a non contact thermometer

@ralanham76

Жыл бұрын

Isn't that what a ir meter is? A very low pixel ir camera ?

@babybirdhome

Жыл бұрын

@@ralanham76Yup.

@Unsensitive

Жыл бұрын

Maybe it'd work in the vacuum chamber, but the radiometer is made of glass, so presume it would block any measurement.

@ralanham76

Жыл бұрын

@@Unsensitive I guess glass blocks some ir.

That's incredible. I've said it before, I love educational KZread but this channel more than any other makes me say "wait, what IS going on here?" Either phenomena I've never seen before, or explanations that blow me away. Great stuff!

I was thinking about anomalous luminescence but it turned out to be good ol' burning stuff to produce light.

@icedbear

Жыл бұрын

It wasn't burning anything. It just turned it hot, which caused black-body radiation.

Did you notice the small point of green light reflected by the radiometer glass @ 3:51? I would be curious to understand the mechanism of this phenomenon.

@VoltisArt

4 ай бұрын

Good catch. I'd first written a guess that the glass of the bulb might be recoloring that reflection, but on repeated viewing, I think we're looking at lens flare refraction inside the glass of the camera lens. The point of light is certainly bright enough to have this effect in the dark room. There are at least two spots visible near the opposite side of the screen from the original bright spot, and there may be corresponding spots near and on the same side as the source, but they're too washed out for me to see. Coating that's commonly on camera lenses naturally shifts the refracted color through multiple frequencies.

I love how you point out that these effects are so weird. That's precisely my reaction. It keeps me curious when I notice stuff like that.

That's amazing. I hope this video goes viral! Thank you for your work and content 👍✌️

Notice an excellent usage of the scientific method here! He kept doing different experiments and showed his discoveries as he went. While he didn't come to a conclusion, he tested several hypotheses.

i always wondered about different types of molecular crystalline structures, and how we artificially create some with specific arrangements? it's kinda like making graphene but with crystals in bigger chunks? i would love an entire episode on this and how it can be used to manipulate light wavelength and possibly discover new properties of quantum physics?? i was thinking it could be combined with light and heat energy to convert it with an artificial process of abiogenesis with controlled parameters! but i don't know what's possible and what not with current technologies and what we can find naturally on earth and in space? and possibly how to discover new arrangements, the theoretical part of vector physics. fascinating stuff!

I still cannot classify the way you approach problems. But your intuition, curiosity and persistence yield a stream of continuing discoveries. I am glad you traced out the incandescence. Perhaps you did find a practical way to use long wavelength IR to make white light. As long as it is reproducible why quibble? "All I've got is this IR laser, but I need white light. Stick it in the vacuum focus it, and be sure to cool it so the lattice or plasmonic states do the right dance and sing the right frequencies." You helped me understand "high harmonic generation" and "frequency doubling" better. And I have never seen those "infrared to red dot laser paper"things before. Or the "glow in the dark, draw with a laser thing" before. I wish I had time to translate your videos into "What are reliable ways to model this, calculate what is happening, and apply it to broader classes of materials and to make new devices or predictive phenomena" web pages that anyone can use to explore what you found, and "make predictions and make new things to share with everyone in the world." If you get a chance, please look at 3 axis MEMS gravimeters that are able to track earth tides. They are sensitive enough to track the sun and moon vector tidal gravity in real time. All three axes almost exactly match the Newtonian vector tidal acceleration with only a linear regression for each axis. Maybe you could try to use an atomic force microscope to monitor tiny movements of masses, when you differentiate the position, it is velocity. Differentiate again and get acceleration. A "gravimeter" is simply an accelerometer sensitive enough to track the sun and moon. Arrays of cheap devices, around the world should be able eventually to monitor gravitationally hot spots inside the earth. Places with more than the usual share of local acceleration changes. Like earthquakes, surf waves, volcanic flows, ocean flows, atmospheric flows and turbulence. Richard Collins, The Internet Foundation

@TheActionLab

2 ай бұрын

Thank you!

A) I will never, ever make fun of your vaccumm chamber, I want to make one, and if I had one and would put stuff in it daily. B) I truly respect your willingness to destroy a sentimental object in the name of science. C) I love how you find truly unique things that seems like they shouldn't exist and then explain in clear understandable language why they do exist, sometime really small little things that are a huge surprise and result in a deeper understanding of how the whole universe works

A lot of times, if you take the base off of those radiometers, they have a valve stem like an incandescent light bulb. I was hoping you would have done that to release the vacuum instead of cracking the whole thing. That way you could have used your vacuum chamber and revived it afterwards.

The Action Lab will one day be the greatest villian this world has yet too see

A brilliant demonstration of science in action. I enjoyed that. Thank you for sharing.

So cool! Love seeing science-you know, that actual process of curiosity, discovery, testing, figuring stuff out. Love it!

How about using thermocamera to check the temperature of the spot illuminated with the IR laser?

I thought that it was probably better in a vacuum because the air was mainly conducting the heat away and also taking some of the heat away through convection.

I love this video. Having someone say I don't know, let's learn more is so rare. Showing us the reasoning and coming to a final conclusion through experiment was just amazing.

That was one of the most simple but impressive phenomenum i had sen on your chanel! Thanks for the explantations

Great demonstration. Les' Lab latest video literally shows how he made a "DIY Supercontinuum Laser! The Ultimate White Light Laser!" Neat timing for some neat systems. You can maybe give him some props and subscribers by referencing his video and maybe doing the same or even more homebrew?

You should make a radiometer with Musou Black and White 2.0, or if you want to go further... perhaps Singularity on the black side and Spectralon on the white side.

@jafinch78

Жыл бұрын

Totally was a thought I had. Great thinking!

amazing work, you keep improving, your best work is yet to come.

Hello from the other side! You may have studied chemistry, but I see you as more of a physicist than I have seen in most of my peers in the past. Experimental physics is just wonderful! In order to be a good experimenter, experience is advantageous and creativity is indispensable for the implementation of the experiment because of...but it is much more important to "pick the right questions", or questions in general - to nature, technology , whatever - to be able to ask. In this video, this fact was highlighted so well! Just great, thank you. I hope you will be able to fill many inquisitive minds with ideas and insights in the future. LG from Vienna

The sacrifices you make for science!

Just Imagine one Day he actually discovers something new by just making these science videos that would be crazy!

@zogar8526

Жыл бұрын

Sadly that is basically impossible. He just communicates mostly well known and understood science to us. Which is amazing and takes skill, pl e ase don't think I am saying otherwise. I love this content. But he isn't running new experiments or anything like that. So finding something new is basically out of the question.

@Lightson_you

Жыл бұрын

@@zogar8526 Mathematically speaking, the probability is not zero so it is possible 😜

@thanhvinhle2893

Жыл бұрын

That happened to Steve Mould (sort of). Well he didn't discover the chain fountain thingy but his video made it wide spread. And 2 people made a paper about it, called it the "Mould effect".

@manipulativer

Жыл бұрын

@@zogar8526 you can construct something "new" though. Its called AC resonant magneto-hydro dynamic propulsion. The DC variant is a fraction of efficiency an AC would bring, but i suspect we are not allowed to use it due to some "mass destruction" laws... Since vacuum is polarizable with such a unit you could push yourself in space too

@mazocco

Жыл бұрын

It did happen to Phillip Mason in his channel, called Thunderf00t. He helped discover some crazy properties about sodium and the coulomb explosion. It is beautiful to see a liquid metal become yellow, blue and transparent.

Whoever makes fun of your vacuum chamber belongs in one. Just found your channel and I'm hooked. Thanks for your wisdom and humility

This was such a cool video! *Totally worth the length. Loved every minute of it* 🙌🤩

Nice video! I think supercontinuum generation would have been very unlikely. It is a process which requires the material to be mostly transparent at all wavelengths (both the input laser wavelength and at the generated wavelengths). Also, it requires an extremely high power ( ~ kW), usually obtained at the center of ultra-short and very focused laser pulses. This is because the type of light-matter interaction with the material that is involved (3rd order non-linearity) is extremely weak in most materials. Also, depending on the strentgh of this non-linearity, the optical pulses should travel in the material for a given length for the spuercontinuum process to be effective, for example few cm or meters in optical fibers, or few mm in photonic chips with more efficient materials. Though it was a nice idea and congrats for managing to rule it out experimentally !

@jafinch78

Жыл бұрын

Yep, I was thinking the same. Though "Supercontinuum in Multimode Fiber" is Les' Lab latest YT video and worth of watch. Great detail and amazing output!

@lamapoule4722

Жыл бұрын

@@jafinch78 I checked thx, nice video!

Your videos are always interesting, many times I have expected you to hurt yourself, I am glad you have not and thankyou for your efforts.

This is my favorite episode! Thank you SO much!

I love your experiments, they are so fascinating to watch and love when you use the vacuum chamber 🤍🤍🤍

Wow, that was really interesting!

This man never fails to surprise

One of your most interesting videos IMO! Happy new year 💥

from the seemingly continuous spectrum i thought of a blackbody emission, glad to had it guessed right. what amazes me is how bright it gets, giving what it seems to be a

Next video you can show how you Fix it, and make more radiometers.

Great video, you should mention that the number of visible photons coming out from the heating is less than the amount of photons going in from the infra-red source, and that that's how energy remains conserved.

@jurginschuhardt4858

Жыл бұрын

Please explain more

@Radicalplay

Жыл бұрын

@@jurginschuhardt4858 when you convert lower frequency (lower energy) photons to higher frequency ones (higher energy ones) - then the number of higher frequency ones coming out should be less than the lower frequency ones going in, this way the amount of energy is the "same" and no energy was created from nowhere ... so maybe from every 4 lower energy photons going in => 3 higher energy photons come out (the 4 to 3 ratio here depends on the frequency difference between the ones going in and the ones going out...)

@jurginschuhardt4858

Жыл бұрын

@@Radicalplay Thank you. I’d love to find more experiments where things seems counterintuitive and then find an explanation especially with energy

Showcased some cool concepts, thanks for sharing.

you are so incredibly smart in the most non condescending way. its really great. thanks for all your vids!!

Very interesting! I wonder, is it just because the vanes are black that it works well or is there a coating on the black side of the vanes that also interacts with the IR?

@vibaj16

Жыл бұрын

probably just b/c it's black (therefore absorbs most wavelengths of light, apparently including IR)

@frantisekvrana3902

Жыл бұрын

Combination of the vanes being black and very thin. They are good at absorbing IR and there is not much matter to transfer heat to.

You need to check the temperature of the Dot because the spectrum appears to be Black body. Your Laser is heating it up but Radiative cooling is extremely bad.

@smi07067

Жыл бұрын

I was going to suggest a black body radiator as well. Since there is no air/gas it can’t dissipate the heat. Also since there is no oxygen it didn’t burn in the vacuum

@alexmcleod4330

Жыл бұрын

I don't think it would be easy to check the temperature of the dot. Those remote thermometers have a much wider cone than their laser-pointers would suggest, so you could just be measuring the average temperature of the entire vane. I'd like to know what'd happen if you kept the laser steady for a few minutes. Would the dot stay just as bright? Would it get bigger as the vane heats up? Is it ablating the carbon away? Maybe it's only the vaporised carbon that's incandescing, because after it breaks free from the vane it can't lose any heat conductively.

@spicken

Жыл бұрын

Radiative cooling is very efficient, actually. That explains why rescue blankets are so useful during mountaineering, etc. The human body loses about 50% of heat via radiation losses (at a miserable 37 °C) the rest via conduction & convection.

Supercontinuum in Multimode Fiber is Les' Lab latest and worth of watch. Great detail and amazing output!

Wow! This is a pretty cool effect that I've never seen before, crazy what light can do! 👍👍👍👍

If you spot it with a udible frequency pulsed laser you can hear the frequency too, photons and phonon will be produced by this carbon coated surface

I enjoyed it.

This is a helpful video. Currently I am struggling converting a infrared laser to visible laser, your video provides me inspiration.

Great demonstration of how knowledge and scientific process can lead to understanding of an unknown phenomenon.

I'm still left with the question how a low power laser can burn the radiometer.

@sadderwhiskeymann

Жыл бұрын

Good question! Given what he said there are 2 factors. a) absence of oxygen b) a focal point distance out of which the phenomenon isn't manifesting

This might have implications for increasing the efficiency of lasers used to produce a fusion reaction.

@ImTHECarlos98

Жыл бұрын

Fusion is already done in a vacuum. Otherwise all the equipment would melt. Also, fusion need really specific elements to trigger. The NIF applies these principals but it’s still a lot of energy that’s needed.

@PeterFraser-hp3rs

Жыл бұрын

@@ImTHECarlos98 Yeah, but maybe the fusionists (if that's the right word) could use this phenomenon to heat up the ambient temperature surrounding the fusion sample and thereby decrease the amount of energy required by the lasers in order to generate the fusion reaction -- just a thought.

@ImTHECarlos98

Жыл бұрын

@@PeterFraser-hp3rs Physics gets weird at the conditions required for fusion, to put it simply. We’re trying to combine some of the most fundamental particles into slightly bigger atoms. From my understanding no material can really survive that temperature (200 million K+), but I’m also not a nuclear physicist. So who knows.

@philipm3173

Жыл бұрын

Incandescence is orders of magnitude cooler than the temperatures that hi-energy plasmas occur at.

@philipm3173

Жыл бұрын

@@PeterFraser-hp3rs you can't heat up a vacuum, heat is just higher vibrational state and if there nothing there, there's nothing to vibrate. Ambient heat is not directional, the point of using lasers is that they are incredibly directional so the heat can be concentrated to a small point. What happens when an atom is hit by very energetic photons (small wavelength i.e x-rays) is that the electrons jump energy states, meaning they move to higher orbitals (further from the nucleus) so while the material is heated up, it means the nucleii are distanced from each other. In order to fuse nucleii, they must be close enough to collide so this is actually something that needs to be overcome (what is called coulombic pressure). This is typically achieved by having a very hi-intensity magnetic field that will confine the ionized material in a dense plasma. This all happens at less than a millionth of a second, the real trick aside from being able to maintain temperatures of over 100 million degrees is sustaining the magnetic field long enough to keep the confinement going and to make back more energy than you spent.

I am always impressed by what can be accomplished by an educated and enthusiastic mind, and such simple tools.

I learned something very important today from you. This was an excellent presentation.

You don't seem to be careful with IR laser. They are extremely dangerous and can inflict serious damage to eyes by accidental reflection that you can not see (and so there is no protective reflex).

@cdvonch

Жыл бұрын

Some ir lasers are not so dangerous at low powers. 1550nm for example is absorbed by the fluid in your eye and therefore little energy makes it to the sensitive photoreceptor cells at the back of your eye. Also, the lens in the eye does not focus 1550nm light onto the sensitive cells at the back of the eye, resulting in relatively low energy density at the sensitive cells and thus less chance of injury. This is how some LIDAR systems can operate out in public without blinding everyone.

@adrir598

Жыл бұрын

Yea it really depends on the frequency

@RealSuperDuperCooper

Жыл бұрын

Dmitry is correct. I think it would be a responsible thing for the actionlabman to invest in a laser safety course. He really is asking for an eye injury - so many safety issues. If he was doing that in a R&D laboratory or even a university lab he would be in serious trouble if not fired. For example, does he know that the 1064nm Nd:YAG laser is not completely converted to green? There can still be a significant, non-eyesafe 1064nm through the nonlinear crystal or OPO. And no, 'just wearing goggles' is not sufficient. Source: I am a laser lab manager. His background is in Chemical Engineering and I love the channel but worry its not going to end well for him.

@pomprocks

Жыл бұрын

@@RealSuperDuperCooper At what point in the video do you see him using the laser without googles?

then try to put a sheet of paper in the vacuum and see if it turns bright with the IR laser......If find it really surprising given you wont feel the laser on your skin

@DHD-

Жыл бұрын

Right, so is there something particular about the properties of the radiometer vane, or will other objects glow white hot in a vacuum when hit with the same IR laser?

That was interesting, thank you for sharing and your efforts❤

I think I agree with your explanation, it got white hot because it couldn't lose heat through convention in vacuum and had a chance to build up heat. But I didn't know about continuous emission, that sounds pretty cool.

So if you combine blue lasers you get ultraviolet that's so cool

@nonothebot

Жыл бұрын

UV lasers are way cheaper than blue ones !!! I'd rather get 2 blue rays with only one UV laser ! But I don't think the combine cristal is reversible...

@manipulativer

Жыл бұрын

@@nonothebot i think they use smth to entangle photons. so 1 high, 2 entangled low

@migueloreles

Жыл бұрын

Some lasers operate at 1064nm, then you double it once to 532nm (green) and then again to 266nm (UV). Or combine the original 1064 and 532 and get 355nm 1/(1/1064+1/532). There are all sort of possible combinations, depending on the wavelength you start with and the wavelength you want. At some point it gets difficult as there aren't many materials that are transparent at these wavelengths.

@thisiswhereidied3054

Жыл бұрын

@@nonothebot it makes me think of styropyro vid where he used some solution to split blue laser (i think) into bunch of orange ones

@nonothebot

Жыл бұрын

@@thisiswhereidied3054 I didn't see this vid could you please give me a link ?

sorry but if it's a matter of incandescence how long can it last before the material carbonizes? You should have tried on the white side as well, what material are the black and white diamonds you used made of? maybe the glow is due to some component of the paint..i don't know why but i can't believe it's a glowing issue due to high temperature, please keep thinking about it and see if you find other possible reasons.

@curtheisler1200

Жыл бұрын

He did try on the white side though. 7:20

@daxdadog

Жыл бұрын

I suspect the black is carbon black, so is already carbonized. Carbon was used a filament in early light bulbs, I believe.

@Ivan_naviski

Жыл бұрын

@@curtheisler1200 True! I missed it, thanks!

yep, pretty interesting as usual... keep up the great work man!

This was what I consider a gem. I was stumped.

Thanks for the video. Your experiment with the radiometer can be very dangerous for you and also for imitators. It would be nice if you warned people not to duplicate any test without proper goggles. Why? Because without glasses, reaching up to a lightbulb causes reflections on the glass of the lightbulb, and those of an invisible laser. Depending on the laser, this can cause irreparable damage to the eye or even instant blindness in the worst case! I hope you wore safety goggles, which should go without saying when doing any laser experiments. That's why I ask you explicitly to warn against imitators.

@CM-mo7mv

Жыл бұрын

Exactly 💯! I am actually very upset with all the KZreadrs not giving appropriate safety information. Some actually do and it can be just as simple as having a card in the beginning to make people aware of the dangers. I think YT should have this as the primary community guideline...

@PepekBezlepek

Жыл бұрын

PRETTY sure this is just a 5mW laser pointer

@Analoque444

Жыл бұрын

@@CM-mo7mv I think he would have done that if he had fully understood the dangers behind it. No one is perfect and I hope they either post a warning in the upcoming video or add a text to their video afterwards. It's not impossible or difficult.

@Analoque444

Жыл бұрын

​@@PepekBezlepek That can even be. We all see how much thermal energy that makes in an air-free environment on a black surface. Check your retina, what kind of environment that is. Would you like such thermal effects to happen there, e.g. through reflections, which you cannot even see because the laser is invisible? Please ask yourself that. Does he also have a measuring device to verify his

That was my initial guess, that it got really hot. At first i didn't know there was a vacuum inside that bulb. So i thought there was some super absorbent paint on those fins that would easily glow. But once you said there is a vacuum inside it i realized that it glowed white hot because it had no way to transfer the heat away from it. Air is pretty conductive for heat after all.

Very interesting vid! Thank you Sir. And happy new year 🎈

Super interesting video! Also, the vacuum chamber is a staple of your channel, I'm always happy to see it! ❤

The lab that I work in uses those IR cards because we have a giant 100+ watt IR laser that we need to track across an optic table. It's probably one of the simplest "sciency" things we use in the lab but I never knew how it worked before, partially because I'm an undergrad and I don't know much, and partially because I had never thought to ask about something so seemingly mundane. That was a great explanation, thanks! Also, it makes a lot of sense that the laser seemed cold. Skin is terrible at absorbing infrared light so it probably just passed right through you. If you had used it on a black balloon I bet you could have popped it. Hope you are wearing appropriate goggles for this-as someone who works with high power lasers, I get paranoid about goggle safety and that laser seems pretty powerful despite its seemingly low image on the IR card. Be safe out there!

You always find something new and unexpected, never repeating what is already told.

Fascinating Video! Also there is another phenomenon to convert lower energy photons to higher energies called upconversion, it basically uses two atoms that get into a higher energy state and another atom which the energy of the two excited atoms gets transferred to which then emits lower wavelength light than what was used to irradiate the material.

This episode is one of your best ones. I like hoy you chase the answers

You are such a nerd and I thank you for that. I find your explorations interesting and beneficial. ❤

@bigbasil1908

Жыл бұрын

No homo btw ❤😛

love these science experiments

This was great, thank you!

That vacuum chamber is the real champion of this channel. 😹

Awesome! Another episode of The Vacuum Lab!

This is the most interesting video that I’ve seen yet on this channel - and I’ve seen dozens and enjoyed almost all of them. And now I’m again missing my radiometer that I got at Disneyland more than four decades ago.

Mad Styropyro vibes, especially lighting the spinny thing with lasers.

Wow!Mind blowing experience!!!

That little "stirling generator" is gorgeous

3:48 you can see a green speck there as well, this is really cool

At some point in the video I started losing hope about seeing the vacuum, but at the end you didn't disappoint!

5:53 RIP Radiometer! A pure sacrifice for science!

This is really a nice video! I am a researcher in the field, I will try to comment in the simplest possible way. Generally speaking, it is possible to obtain supercontinuum generation even with continuous wave laser. One of the main source is a process called four wave mixing. Four wave mixing is a third-order non linear process. This means that you need really a lot of power and tight focusing to have it with a continuous source. Moreover there is a lot of power directly transferred to the material, so it is also easy to damage them. To avoid this, in our field we prefer femtosecond laser in order to effectively generate supercontinuum. Also the frequency doubling that you are showing for generating green light is a second order non-linear process. So it is much easier to handle it even with a laser pointer. Considering the low amount of power one can have with a diode laser, the easiest explanation that comes in my mind is that you are emitting a "black Body" radiation. In vacuum you expect to be much more efficient since there is no thermal contact with the environment, so the material can reach higher a temperature and emit in the visible spectrum.

hello from spain, i'm amazed every time i watch one of your videos

Nice one..& you could use the vacuum chamber as well..;) But can concept be used to warmup the oil in the new kinda solar energy generators which don't use traditional solar panels...!

So instead of one crazy result you got a completely different but even crazier result xD I love it. That radiometre material has interesting properties