I had no idea Florescence was temperature dependent. Really fascinating!
@DmitryKiktenko
2 жыл бұрын
Regular "glow in the dark" material can give you some extra light with heat. if heated already didcharged it will glow for some time again, like, it lets some trapped light to get out faster.
@magset
2 жыл бұрын
he's your science prof.
@notdonaldst
2 жыл бұрын
I remember when I was 14 my friend and I found some phosphorescent fungus on a stick when hiking at night. It glowed for hours. It was the coolest thing we had ever seen.
@chronofactor2037
2 жыл бұрын
That sounds awesome, I've been wanting to find a way to grow such mushrooms, but I'd need to get regular mushrooms down first probably.
@anaphylastiks
2 жыл бұрын
We have lots of them in NZ. Growing mushrooms is probably the hardest thing I've ever done.
@anaphylastiks
2 жыл бұрын
@@DrDeuteron oysters and etc are easy, but extraction from the habitat and regrow, or spore print, is difficult. Rewarding not so much.
@Edward_Jin
2 жыл бұрын
@@DrDeuteron Wow, thanks a lot! That's really cool!
@womeu157
2 жыл бұрын
@@chronofactor2037 what kind of mushrooms do u call “regular”🤔🤨🤨
@StockDoctortrade
2 жыл бұрын
Action lab never fails to impress me
@sigma7208
2 жыл бұрын
Wait what?
@Periwinkleaccount
2 жыл бұрын
@@sigma7208 what do you mean? It’s a normal comment.
@sridathan1876
2 жыл бұрын
@@Periwinkleaccount yea
@sigma7208
2 жыл бұрын
@@Periwinkleaccount video was uploaded 1 hour ago but this comment was showing time 3 hours ago.
@IncroyablesExperiences
2 жыл бұрын
Your are sometimes soo close from research level that maybe you'll discover something new one day! You don't have enhanced devices but you manage to do workings things soo fast, even complex sometimes and you try a large diversity of subjects. Is it your own subjects each time? You're the only one that don't do what others make, you're a real source of knowledge, especially because you know the theory behind things.
@Periwinkleaccount
2 жыл бұрын
@BUST ON ME NIBBA that’s like like like saying really good teachers aren’t doing anything special because the things they’re teaching are already known. Because it is. Also, what chain of events lead to you thinking using that username was a good idea?
@mathysgobeil1592
2 жыл бұрын
@Incroyable expérience tu existe encore! Cool, je croyais que cette chaîne était morte
@nicholasocampo3293
2 жыл бұрын
Yeah that's why whenever I get on KZitem I'm always super stoked to see what he has in store because most likely is going to blow my mind
@addisonkirtley1691
2 жыл бұрын
You’re*
@westonding8953
2 жыл бұрын
He explains everything very well!
@brett4264
2 жыл бұрын
What happens when you heat up a phosphorescent material. Does it glow for less time? It seems there's only one thing: phosphorescence with varying times of glow dependant on the materials temperature. Fluorescence is just one form of phosphorescence.
@eideticex
2 жыл бұрын
I can tell you from printing a fluorescent plastic that you can heat it too much and ruin the fluorescent effect while still maintaining the bright color in ordinary room light. If I print that stuff at 210C it is incredibly bright flourescent, even a near-uv light sets it off like a light bulb. Take it just 10C higher and no glow, even right on top of the uv source. Definitely some chemistry changing as a result of temperature.
@ARCSTREAMS
2 ай бұрын
@@eideticex why are they not making lasers from these plastics or material?
@Mysoi123
2 жыл бұрын
Wow, One of the coolest experiments with liquid nitrogen I ever seen!
@silvasen1985
2 жыл бұрын
Cold light would be pretty *cool* , imagine feeling hot and just staying under the cold light
@AndreVanKammen
2 жыл бұрын
They use lasers to cool atoms down to almost absolute zero, you could call that cold light. I don't think that will work on a human scale since it works similar to noise cancelation, imagine trying to cancel all waves in the individual atoms on the skin of your body.
@silvasen1985
2 жыл бұрын
@@AndreVanKammen oh wow
@yeet1337
2 жыл бұрын
@@AndreVanKammen Yeah and also you need multiple lasers from different directions which our skin would block. Even if you could manage powering 10^24 lasers..
@JohnDlugosz
2 жыл бұрын
Bumping into other atoms has nothing to do with the energy levels of the electrons. It works by absorbing UV that bumps it up _two_ levels; then it falls back down one step at a time. What you are seeing in plastic has to do with _excitons_ which are a bound state of an electron and a hole. Molecular vibrations will indeed destabilize this, so it works better when colder.
@scottmatznick3140
2 жыл бұрын
Next, dark heat
@thekemosabe346
2 жыл бұрын
Awesome video! You’ve sparked an interest in science I never knew I had! Thank you!
@YounesLayachi
2 жыл бұрын
This might be the best example of what makes your channel so great. You demonstrate some obscure phenomenons that under regular circumstances, are so uncommon or implausible, nobody talks about them or even considers them. Like ignoring friction in beginners classical mechanics, but to an extreme level. So this adds unnecessary obstacles in front of anyone trying to understand such physics concepts. Physics course put too much importance on what's useful, they discard most of what makes it logical, consistent, and true
@viejaspeliculasfilipinas3621
2 жыл бұрын
My science teacher was shocked of how I learned science so much, even though I don't read science books This guy, is just amazing at everything
@rayeeshabhat2403
2 жыл бұрын
Is it possible to make fire underwater?Flares work underwater
@hellbusterdragon
2 жыл бұрын
With sufficient oxygen and fuel source, yes.
@rayeeshabhat2403
2 жыл бұрын
@@hellbusterdragon Ok.Thank you
@stevenmielke1662
2 жыл бұрын
I learned a heck of a lot in 8 minutes. Thank you! :D
@lohitsaiganta369
2 жыл бұрын
Everyone listen before putting the cap in Nitrogen i.e,The Normal Highlighter You can see that it Glows after the light is turned off. When you put video speed to 0.25X Speed BUT FOR A MILLISECOND IN 0.25 Seconds also
@TheActionLab
2 жыл бұрын
I think that was more of the camera changing ISO quickly when it went dark. In real life there is no quick flash.
@KaTyJP
2 жыл бұрын
@@TheActionLab i love ur channel thanks for putting the effort into making ur videos just to entertain and impress us, wish you luck, you never fail to impress me and you are a great KZitemr.
@lohitsaiganta369
2 жыл бұрын
@@TheActionLab Thanks for commenting I didn't thought You would comment Thank you very much 😀
@seanurquhart3179
2 жыл бұрын
I love this one. One of the cooler things you've shown on your channel. Sometimes your lack of safety gear for some experiments kills me a little inside though lol.
@newtonsbackyard
2 жыл бұрын
After cold fire, we have cold light. You rock 🙌🙌👏👏
@01DOGG01
2 жыл бұрын
Explain the processes going on within the Sun and how a single photon can take a very long time to make it out to the surface. That is mindblowing.
@JohnDlugosz
2 жыл бұрын
It's not a single photon taking years to escape. The emitted photon heats up the nearby material. The _energy_ diffuses slowly, using thermal convection, more radiation and absorption, and phonons. Hot things glow. So you see the hot surface.
@yeroca
2 жыл бұрын
I'm curious why the highlighter cap changed color to red when cooled. Is it because there are two compounds that give off photons, one green and one red, and somehow the green one is losing its higher energy state before the red one does?
@MrGiouvas
2 жыл бұрын
At 7:16 you can see the the same spike of light happening when there's no cold object so I'm thinking the ultraviolet light bulb is giving off some lower frequency light and that's what's visible on the cold objects so maybe that has something to do with it
@kazimir8086
2 жыл бұрын
Is it really “flashing”? or is the camera adjusting to darker light conditions?
@zacherysmith2667
2 жыл бұрын
Well if the camera was adjusting wouldn't it do the same regardless of the liquid nitrogen? I believe that is why he showed it before and after.
@pwpw6136
2 жыл бұрын
I really enjoy your content
@wlockuz4467
2 жыл бұрын
This is the most mind boggling thing I've seen in a while
@GREGATHOME2
2 жыл бұрын
Note that the emission you are seeing is from molecules, not atoms. This adds the effect of vibrational and rotational excited states which are impacted by temperature.
@justitroyal7032
2 жыл бұрын
4:24 it had a red flash even at room temp but short
@dirrtbikekid7
2 жыл бұрын
This makes me think of super conductors. We have to cool them to allow for the superconducting effects. Idk what if the process to make glow in the dark like on floresent materials could work for making room temp superconductors
@doctorpurple5173
2 жыл бұрын
Naw the two effects aren't really comparable, superconductivity happens from a substance getting cold enough that electrons can form Cooper pairs, to make higher transition temperatures for superconders you gotta make Cooper pair formation more favorable, but when making a glow in the dark substance you are trying to get electrons to absorb higher energy photons and release lower energy photons after a delay so to make a higher "transition temperature" glow in the dark material you're trying to find chemical compounds where the electron fields can form very metastable excited states. While both effects are very awesome and are affected by temperature they are very very different and we aren't even super sure about all the details about how superconductivity works yet so phosphorescence isn't a helpful model anyway lol
@crazyskullguy
2 жыл бұрын
Can I ask if you come up with your experiments by yourself? Or have a group working on the ideas and content. Your videos are so much fun to watch and I am huge fan. I too live in Oregon now, originally from India. Please keep up your awesome work. They are engaging and educative. Thanks.
@rockstar2PL
2 жыл бұрын
I remember when I was a kid, we've bought those glowing bracelets (basically thin, bend glowsticks, shaped like a ring) and someone told us that if they stop glowing, all we need to do is just freeze them overnight. I've never tried that because I've lost mine, but now I understand where this idea came from.
@pwpw6136
2 жыл бұрын
Wow this is an amazing video
@excentrisitet7922
2 жыл бұрын
I didn't have liquid nitrogen to experiment with but from my mom I did have an old powerful soviet flash. One which works from 220 AC and turns you completely blind when used in the dark. And I found out that many things exhibit similar behaviour. The effect lasts much shorter, somewhere around fraction second so in order to see it I closed my eyes as tight as possible stuck the flash to the object of interest, made a blast and immediately after that watched for the result. And the surface of the object where it contacted to the flash was noticeably glowing even though the effect lasted less than a second as I was saying. So it should be something like a triplet phosphorescence. Thanks for the info.
@iron_blood7
2 жыл бұрын
You explained clearly about how the needles in our watch actually glow.
@bidish2224
2 жыл бұрын
fluorescence and phosphorescence occur in all things but at very different temperatures
@adammihalik730
2 жыл бұрын
Please, may you do it with rock or dust or sand? If it would work, it may means, that we can detect a dark items in space (meteorites, or so) by emitting a black light and watch for flickering of near objects :-D . Afaik, Space has a temp about 2 K, liquid nitrogen is much more hotter
@kylezo
2 жыл бұрын
This really helped me understand that when we see things in visible light, they're literally actually glowing, absorbing light and reflecting it out. Cooling these objects shows basically what is happening in super slow motion.
@consmi0
2 жыл бұрын
Most things just reflect light (bounce it off), fluorescence & phosphorescence are a different/special process. Although, even things that don't fluoresce or phosphoresce in the visible range typically still emit lower energy infrared radiation as a result of molecular vibration.
@RandiRain
2 жыл бұрын
Interesting. Do we know if the colder it gets, the more it happens? What happens when it's brought down to close to absolute zero?
@jfmaster1507
2 жыл бұрын
Please James...I can't do this without you..I'm close to something outstanding...
@mysticpointwatersports204
2 жыл бұрын
the residual cold is putting a compressive effect on the matter which is many step changes slower time light .. the pre lighting then compressing the edge is pulling light out between change ratios. cool experiment. compression will emit light in relative ratio effect
@dearmistyann3710
2 жыл бұрын
Action Lab guy. The true hero of ADHD science.
@Grim_and_Proper
2 жыл бұрын
I have a bit of a critique for your title as this is cryogenically activated phosphorescence. The emission is induced by absorption of the UV light, not the temperature change which activates the photoelectronic pathways instead. Unlike triplet phosphorescence and fluorescence, the mechanism for persistence phosphorescence is poorly described even though it is well known within the spectroscopy community. The lack of a mechanistic description is mostly due to the complexity of the pathways. It is known that electrons and holes are trapped apart and slowly migrate back with the fast non-radiative decay pathways available at room temperature being inhibited by the low temperatures. It is interesting that the emissions appear to be mostly one colour suggesting that the recombination leading to emission is involving a limited number of phosphors (possibly only one). Enhanced triplet phosphorescence is very well understood and is due to exactly what you said, an inactivation of non-radiative decay pathways. It also makes some low energy states available for decay into which are usually inhibited by the systems thermal energy. It is also diagnostic of phosphorescence vs TADF (thermally activated delayed fluorescence). The relatively fast decay of the triplet phosphorescent bulb is likely due to the efficiency of the triplet emission pathway acting as a sink so that limited persistent phosphorescence could occur.
@merenkov
2 жыл бұрын
You should definitely try this with uranium glass
@christopherleubner6633
4 ай бұрын
Triplet phosphorescence is the reason why dye lasers cannot opperate truly continously. The dye must flow or the laser must operate pulsed. In practice the dye usally flows in both types, even pulsed lasers. The triplet state delay will not allow the dye to reach the upper lasing level.
@bungwohlio
2 жыл бұрын
0:37 sounds like a discription of me being drunk.
@Edward_Jin
2 жыл бұрын
This really blew my mind! Thank you Action Lab! You raised a very interesting research project actually.
@philouzlouis2042
2 жыл бұрын
@just some guy tired of life I think that more heat means more agitation of atoms and molecules (electrons have little effect - because they vibrate and spin way faster - except if dramatic heat difference like several thousand of degree C°). The decay of fluo-phospho-rescence depends on the quenching due to other atoms shocks against the excited atom...in organic chemistry it is often dioxygen (or water containing O2) that reduces the fluorescence. It seems logical that if you reduce the amount of vibrations/moves of atoms and molecules...you strongly reduce the amount of inter-atomic-molecular shocks and thus you slow down the quenching/reduction of fluo-phospho-rescence...as a result decay last longer and is less intense. It is interesting to observe the emitting radius around the fluo yellow pen (like 15 cm) reduced when frozen (to about 2 cm)... so freezing reduces brightness a lot and extends brightime much more) One may conclude that at absolute zero °K... brighttime will tend to infinity and brightness to zero. Would be interesting to see the effect with a superfast camera... then you would see fluorescence the same way as when frozen. Also the stange orange glow of the yellow plastic pen and the longer glow for the yellow rope may/must be due to multicomponent system...with different fluorescers/phosphorescers with different decay time... I guess the experiment would be very interesting with a mix of different fluorescing/triplet state phoshorescing stuffs (like overlapping draw lines of fluomarkers or dried solution of various mixed fluo dyes) in super slowmo unfrozen and frozen... there should be various color changes as a function of decay times and brightness of each dye...some will extinguish faster and other slower with varous color additive effects. I also wonder how ruby would react being fluo flash pink fluorescent. PHZ (PHILOU Zrealone from Science Madness forum)
@aComedicPianist
2 жыл бұрын
Imagine doing this outside in Antarctica during the nighttime in winter.
@1.4142
2 жыл бұрын
You never run out of cool experiments!
@Slowly_Going_Mad
2 жыл бұрын
Whoa. That is profound. I heard of exotic lasers that have to be kept cold like that to function, but this demo showcases this to an extent I never dreamed of.
@danielleohallisey4218
2 жыл бұрын
Another brilliant video! I’d love to see you demonstrate nonlinear optics where the emitted light is of a higher frequency, as in blue laser pointers where a crystal is bombarded with IR light and emits visible waves. I only barely know that it exists and don’t know how it works; you could probably translate it for your viewers!
@khaliffoster3777
2 жыл бұрын
That means for conductor objects and insulator objects when you put in freeze temperature with black light, so either it will show non-fluorescence, to fluorescence, to phosphorescence, so it is a range of holding the heat within which it can resist well to object so base on cold radiation of an object which insulator last longer so it resists heat well, so hot radiation resistor relative to cold radiation of an object, so when put in cold liquid, it last longer the cold light so it holds the heat of colder temperature, like a conductor that holds heat, so insulator holds heat, plastic hold the heat longer then it disappears. Well, it is a good to test for which is a conductor or insulator for resisting the cold and resisting the heat.
@jakestellar4600
2 жыл бұрын
Exactly how MoonLight works ! You should do the MOONLIGHT TEMPERATURE EXPERIMENT!!!! Moonlight is cooler than moon shade ! Exactly opposite of the SUN
@VKURDR
2 жыл бұрын
im interested but confused. as usual sometimes but always cool! thanks for taking your time to do research and give real information, and then setting up a video for it just so we can sit at home, or work, or play, and watch youm
@spellxthief
2 жыл бұрын
this is so neat! i love glowy things and the idea of science behind them
@dcamron46
2 жыл бұрын
Because thermal interaction provides path to relaxation of excited states. The cold freezes it in excited state long enough to relax by luminescence
@sebbes333
2 жыл бұрын
*@The Action Lab* What happens if you cool down something long-time phosphorescent? like: 1:52 (glows forever? almost? Doesn't glow because too cold so we don't see the like 3 photons coming off it?)
@danielyuan9862
2 жыл бұрын
I'm pretty sure you answered your own question. I don't know if it would still be called phosphorescent, but if you lower the temperature far enough, you would get weaker responses of light.
@veenoir1991
2 жыл бұрын
When i was a kid and black lights and UV posters were really popular, i used to take a highlight marker and squeeze the ink in a glass bottle with water. like an old coke bottle, jones soda, or a sobe drink...then turn on the black lights and they looked like little toxic lamps haha
@kwinmad
2 жыл бұрын
Another great video. I wish that I had been taught like this at school. I probably would have taken more notice!
@RobBoyBlunder
2 жыл бұрын
I feel like this might explain the idea people got to put glowsticks in the freezer to make them last longer? It also explains why in winter versus summer my glow in the dark stars stay lit for what seemed longer! I will say though, I wonder if freezing glow sticks was the idea that it slows the chemical reaction decay time too possibly. not sure!
@RIDGELAKE101
2 жыл бұрын
You had me at there not flies there "walks" lol.
@Abish_
2 жыл бұрын
Hehe 5:38 tip of the forceps became phosphorescent too
@JohnAltenburg
2 жыл бұрын
This helped me understand "heat" and electron topology. Thanks!
@haros2868
2 жыл бұрын
Pretty cool, i have an experimental question, what if you took an already phosphorescent object, like glow in the dark paint, and you freeze it? Or just imagine taking the most phosphorescent object and freeze it with liquid helium.
@chrisfuller1268
2 жыл бұрын
We cryogenically cool light sensors all the time, so the effect is understood, but materials are used which don't interfere with the measurements. Cool video, though I thought you were going to talk about super-cooling atoms using laser light.
@anoimo9013
2 жыл бұрын
Very nice. I did not know that so many common house objects were fluorescent
@ballenf
2 жыл бұрын
Such a nice break not having a sponsor segment in the video.
@yura2424
2 жыл бұрын
Wow! He always finds some new and interesting stuff
@thatnonchalantguy
2 жыл бұрын
It makes me consider the possibility blackholes release invisible electromagnetic energy from what should be an ultra energy dense, bright source. by a partially similar manner to in which fluorescence was described here, but considering irrelativistic distortions of space-time hidden behind an event horizon, which serves as a barrier and lens regarding the limits of space-time and what can be expressed or filtered, relative to space-time as we observe it, having a hugely exponential effect It would be interesting to learn Hawking radiation was something much more simple than the explaination of quantum field... like if it could be the result of particles that are not moving faster than light, relative to it's origin reaching a boundary in its gravitational gradient where it does, it gets filtered by said gravitational gradient only leaving the degraded, time skewed fractions to escape.
@boweadam1
2 жыл бұрын
Could this attribute be useful in the cold of space? I expect we will find all sorts of things with the new JW telescope
@luke144
2 жыл бұрын
I thought I had seen it all... How was I not aware of this? Dang, this is really cool!!
@alandalsing522
2 жыл бұрын
Fascinating! Some basic research grants to be had... Also makes me consider bioluminescence, especially since many deep sea creatures exploit this chemistry at high pressure & low temps. Thank you for continuously experimenting!
@ryang8116
2 жыл бұрын
This guy just made an orange peel and normal wax glow in the dark... incredible!
@marcfruchtman9473
2 жыл бұрын
Really great! Thank you this great topic.
@MrTlong2010
2 жыл бұрын
You have one of the best KZitem channels!
@МаксимЯромич
2 жыл бұрын
Now I finally know how these clock hands glow in the dark after you shine light on them
@berner
2 жыл бұрын
These demonstrations really were... SO COOL! Curious, you refer to them as "cryogenic" but wouldn't they be more "cryonic"? Is there a difference between the two? I could easily look it up but it would make it all the more awesome if the explanation came from you :D
@varunyadav7406
2 жыл бұрын
Cryogenic and cryonic are different.
@Legionn
2 жыл бұрын
I needa know, are you a teacher or a professor? because your very smart and i doubt someone with such brilliance would just do youtube with it and not have another job thats sciences.
@Adi-qh4id
2 жыл бұрын
You should try this with a few cubes of different material/density and paint a few spots on them with venta black and check. Maybe it lasts longer since it absorbs more energy. :)
@empmachine
2 жыл бұрын
Amazing effect! I had no idea, but at the same time it makes sense that slowing it all down (i.e. cooling) would also slow the effect of fluorescence.. Broccoli !!! Try broccoli under UV.. it kinda fluoresces red/pink ish..
@belgarat0
2 жыл бұрын
I have a super rare diamond that becomes phosphorescent for 5 minutes after being exposed to a particular uv wavelength. I wonder what will happen if we freeze it in liquid nitrogen
@System32F
2 жыл бұрын
Pretty cool experiment excuse the pun, I knew temperature changes how florescent things act but things that we do not consider florescent at normal temperatures I had no idea about
@LVIS-a
2 жыл бұрын
Never seen that before. That's pretty cool
@ACETONEWALL
2 жыл бұрын
I don't know but it seems like you're somewhere between the second law of thermodynamics and entropy. Or somewhere between a rainbow
@sushilkumarlohani6709
2 жыл бұрын
WOW, I mean this can potentially end all AC and Fan business!
@jonnybice1423
2 жыл бұрын
How cold does something have to be for this reaction to occur? Is it possible to recreate this experiment on a larger scale in a human tolerable environment for example in the Arctic? Also would ice or using a solution of saltwater and bringing said solution down to a freezing temperature allow the effect to take place?
@newt7743
2 жыл бұрын
This is truly amazing
@CoinDragon
2 жыл бұрын
Liquid Nitrogen fireflies! Very cool...literally!
@riks7256
2 жыл бұрын
this is cool! now i want to see a slow motion camera recording the room temperature marker
@swanseajak3
2 жыл бұрын
Probably the most interesting video iv watched all week
@melissaburger3497
2 жыл бұрын
I didn’t know who else to ask but you, can you use chemicals to discolor electricity (like on a jacob’s ladder) the way you can with plasma and fire?
@Fuzion9000
2 жыл бұрын
action lab in 2073: Today, i will teach you how to make a thermonuclear bomb by using a microwave, a burger from mcdonalds, and 3 computer mice
@omegaweapon1980
2 жыл бұрын
Try the experiment with objects of with different densities. I'm just curious if the density will increase or decrease the longevity of the effect.
@blackbear92201
2 жыл бұрын
Awesome video. I think you're onto something significant. thanks for posting! :D
@freehat2722
Жыл бұрын
Awesome work.
@davemarm
2 жыл бұрын
Just curious but how do you know that it is the temperature that is causing this and not the liquid nitrogen itself? Can you cool the items down without having them come in contact with the liquid nitrogen to prove it?
@MarkoPiroski
2 жыл бұрын
What if you cool down Musou Black coloured object? Would it emit any light at all?
@thehyperscientist1961
2 жыл бұрын
Truly amazing indeed!
@arindamchandrapathak8318
2 жыл бұрын
Why the hell is this so cool than it can be explained?
@mr-barehiney
2 жыл бұрын
Wow this light is so cool!
@Anthracyte
2 жыл бұрын
This is very interesting, and your point on 'cold light' got me thinking about fireflies and their bioluminescence. Have you done such an experiment on here before? Is there a way to synthesise a firefly light using such enzymes or chemicals?
@dijasom
2 жыл бұрын
always surprised by the things you find, nice video mate!
@JustaReadingguy
2 жыл бұрын
I have noticed that powerful strobes can drive lots of materials in to phosphorescent, like your cooling except it happens at room temperature.
@adamplace1414
2 жыл бұрын
This channel always has cool tidbits I've never seen before.
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