How Do Toys Glow in the Dark?

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  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 599

  • @thedesucomplex4365
    @thedesucomplex4365 8 років тому +17

    I love when Lego pieces come in glow in the dark colors. It is awesome to see that it's a pretty simple thing that captures and reemits the light.

  • @ravenlowes1830
    @ravenlowes1830 8 років тому +211

    Anyone else still have those glow-in-the-dark stars on their ceiling? I do!

    • @sirBrouwer
      @sirBrouwer 8 років тому +12

      at my mother's home in my old bedroom i do.

    • @coyote9594
      @coyote9594 8 років тому +4

      yep

    • @BusiedGem99
      @BusiedGem99 8 років тому +4

      Not stars, but planets for me. xD

    • @TaberIV
      @TaberIV 8 років тому +2

      My girlfriend does haha

    • @ravenlowes1830
      @ravenlowes1830 8 років тому +2

      +BusiedGem Official cool

  • @tennicktenstyl
    @tennicktenstyl 8 років тому +55

    "without being dangerous to humans using the watch" *cough* radium girls *cough*

    • @googleeatsdicks
      @googleeatsdicks 8 років тому +9

      they were not using the watches

    • @frankschneider6156
      @frankschneider6156 8 років тому +8

      the radium girls LICKED the stuff ... continuous incorporation is a lot worse than a little bit shielded by metal and glass ... although you are right, that it's not advisable to wear that stuff ... Do you recall the unshielded X-ray devices in shoe shops in the 50s, so you could see your skeletal foot in the shoes to determine if they are of the right size ? Now that's dangerous ...

    • @tennicktenstyl
      @tennicktenstyl 8 років тому +1

      Yup, I do. Also, radioactive dish plates were kinda bad, I don't know if it was radium paint though. Man, people need to do more research before putting stuff for personal use.

  • @TheManOfRash
    @TheManOfRash 8 років тому +64

    I had a glow in the dark cast on my broken leg as a teenager. Sketched out so many people with it huehehehe

    • @marinamartinez9667
      @marinamartinez9667 8 років тому +8

      I never knew you could have a glow in the dark cast!!! It would have made my experience with a broken arm more enjoyable.

    • @1kili2
      @1kili2 8 років тому +8

      people probably didnt tell anyone about these because kids might be more attempted to break something for a glow in the dark cast, i mean fully grown people like us would never do that though... right?...

    • @Fematika
      @Fematika 8 років тому

      I'm not fully grown... Eh I still would never do that since it is a lot of work for something that is just a distraction and an inconvenience.

  • @Moonbeam143
    @Moonbeam143 8 років тому +244

    To me, it'll always be magic.

    • @GamesFromSpace
      @GamesFromSpace 8 років тому +37

      Well, it's a quantum effect, so it might as well be.

    • @quame5565
      @quame5565 8 років тому

      what is magic

    • @Moonbeam143
      @Moonbeam143 8 років тому +3

      Thee Original Trainer Gamer The thing that's in every child's heart.

    • @thelonelygamer361
      @thelonelygamer361 8 років тому +3

      I think that stuff is called blood

    • @markjosephcueto2883
      @markjosephcueto2883 8 років тому +2

      THE FUTURE IS NOW THANKS TO SCIENCE!!!!

  • @TheSledgehammer205
    @TheSledgehammer205 8 років тому +14

    To continue on this luminescence theme, could you also cover electroluminescence that's often used in back-lighting of LCD displays and fancy Tron-like "lighting" that's used on cars, bikes and by some modern dance troupes?

  • @theseigemeister
    @theseigemeister 8 років тому +8

    I had those glowy ceiling stars on my ceiling as a kid. They're awesome!

  • @halfwhiteNnerdy
    @halfwhiteNnerdy 8 років тому +1

    I used to have a little doll, some kind of dog/bunny thing, called Pj Sparkles. Which I proceeded to name, in my lack of imaginative 6 year old ways, Sparkles. That thing still glows in the dark and its been a good 20+ years.
    Not particularly relevant to the video but it reminded me of it.
    Great video!

  • @NessaOfDorthonion
    @NessaOfDorthonion 8 років тому +1

    I love you guys. I'm a visual learner and I love science, you guys have taught me so much since I found your channel :)

  • @briahnadeanda158
    @briahnadeanda158 8 років тому +1

    The glow in the dark stars that I put in my playroom at my grandmother's house as a child are still there and they still sort of glow at night. plus my gma uses that room as her bedroom now, which I think is kinda sweet because we've always been close

  • @fruiteateryummy
    @fruiteateryummy 8 років тому +12

    Man, I still got those stars on my celling.

  • @Master_Therion
    @Master_Therion 8 років тому +54

    Today we give glow in the dark toys to kids... but in Soviet Russia, kids give glow to toys.

    • @sirBrouwer
      @sirBrouwer 8 років тому +6

      no that was/is in Chernobyl Ukrainian. there everything glowes.

    • @Master_Therion
      @Master_Therion 8 років тому +1

      sirBrouwer You are right, Ukraine was in the Soviet Union when Chernobyl happened but that's not the same as Russia. My mistake ^_^

    • @sirBrouwer
      @sirBrouwer 8 років тому +1

      Master Therion finally I did it now I can sleep for 5 years under this rock. See you in 5.

    • @Master_Therion
      @Master_Therion 8 років тому

      sirBrouwer What did you finally do? Why are you sleeping under a rock? Sorry, I am confused.

    • @sirBrouwer
      @sirBrouwer 8 років тому +1

      Master Therion i was trying to take the piss out of my self. As if I only knew this only fact and nothing else.

  • @Edgewalker001
    @Edgewalker001 8 років тому +1

    We also use these super cool fluorescent dye molecules for other stuff, like for example to measure the amplification of DNA with Real-Time PCR.
    My personal favorite is still bio luminescence, which essentially is chemoluminescence inside living cells, we also use some of those compounds at the lab when sequencing DNA, more specifically the ones fireflies use to glow in the dark.

  • @ChocKsic
    @ChocKsic 7 років тому +14

    My mom used to buy me some of the stars. One day she got me a glowy castle set. We were talking one night and she thought she saw one if the stickers blink. The said they were demon possessed and then threw them away. :(

  • @Ravenclaw1991
    @Ravenclaw1991 8 років тому +27

    I have a ton of glow in the dark stars on my bedroom walls and ceiling!

    • @Jtngetabettername
      @Jtngetabettername 8 років тому +1

      Me too....

    • @seabb
      @seabb 8 років тому +1

      I used to have a ton in my old bedroom...I had no idea that they had already been around for so long

  • @nathantron
    @nathantron 8 років тому +26

    OH COOL! I can melt down my collection of 5000 glowing military watches and make a nuclear reactor!!! :P

    • @1kili2
      @1kili2 8 років тому +28

      it comes with inbuild timer

    • @frankschneider6156
      @frankschneider6156 8 років тому +2

      +Nathan Trone
      Actually, some idiot has already tried exactly that 20 years ago with the goal to build a home reactor. There is even a book about it. Just google "The radioactive boy scout". There is no idea too stupid, that people wouldn't try it. That's why the Darwin award is so important.

  • @PolyPolygon
    @PolyPolygon 8 років тому

    It feels so good when you know the answer before the video and confirm your right.

  • @Kavriel
    @Kavriel 8 років тому +23

    I wish the explanation was more in-depth, because trapping the light and emiting it, isn't.

  • @HajoBenzin1
    @HajoBenzin1 8 років тому +55

    thx!!!! I asked this 2-3 months ago :)

    • @imfrommanndame
      @imfrommanndame 8 років тому +10

      I usually just go to wikipedia and ask the man in the counter there.

    • @Mondos2001
      @Mondos2001 8 років тому

      +imfrommanndame AT the counter?

    • @alyanmeraj
      @alyanmeraj 8 років тому +1

      +mondos2001 IN.

  • @qryptid
    @qryptid 8 місяців тому

    I wish there was a version of this on SciShow kids, my oldest is wanting to know but the language in this is a bit advanced for a six year old lol. We'll still watch together and talk about it but I'll also keep looking for kid friendly resources

  • @tohopes
    @tohopes 8 років тому

    Hank, you're a STAR ... of UA-cam!

  • @cushingpushing
    @cushingpushing 7 років тому +1

    Thanks for making this video, I have often wondered what made toys glow in the dark.

  • @gamiezion
    @gamiezion 8 років тому +1

    yeah, thanks for telling me stuff i have known since being a kid. which was well over 20 years ago.

  • @phantasm1234
    @phantasm1234 8 років тому +3

    Can you do one on cerebral aneurysms? I had one rupture at 19 and would love to learn more!

    • @ronniessebaggala362
      @ronniessebaggala362 8 років тому +1

      Am a neutralscientist. You should go as your doctor or you shouldn't ask your doctor.

  • @gissellejarquin2875
    @gissellejarquin2875 8 років тому +28

    Do an episode on how water gets in your ear and how it gets out

    • @sterlingh9586
      @sterlingh9586 8 років тому

      yes pls

    • @crazyconspiratard6696
      @crazyconspiratard6696 8 років тому +2

      Your ear produces a bubble that blocks the water, and if you pop it, instant ear infection.

    • @professionalfire3902
      @professionalfire3902 8 років тому

      +Crazy Conspiratard Scary

    • @josiahbaumgartner7643
      @josiahbaumgartner7643 8 років тому +1

      Water gets in your ear by going inside your ear and then it stays because of how small the tubes are, and especially because of the hair in there. the small openings mean the surface tension of the water is strong enough to hold it inside for a while. Don't ask how to get it out. That's a question as old as time that even science doesn't have an answer to.

    • @anotherbencultmember9125
      @anotherbencultmember9125 8 років тому +1

      It gets in by going through the hole it gets out by going through the hooe

  • @shinypaintf588
    @shinypaintf588 4 роки тому

    thank you!! i got some of those famous stars a little bit back as a pass me down from a friend's mom and this was really helpful!!!!!

  • @thickandfuzzyblanket
    @thickandfuzzyblanket 2 роки тому +1

    It's 4:33am I am obsessed with glow in the dark stuff being older I probably shouldn't be so fascinated by it as I am since I was little I've always loved glow in the dark things fun memory I have that could be the first time I learned about it we were moving and found stars through out the rooms I love glow in the dark so much I have blankets stats toy figures paint ect.it goes hand and hand with my love of space and clouds

  • @Thumbsupurbum
    @Thumbsupurbum 8 років тому +2

    How come everytime I walk through a spider web, I instantly become a karate expert?

  • @garycaldwell7133
    @garycaldwell7133 8 років тому

    Hi Sci-Show
    Can I ask what is healthier, Normal full fat milk or milk that has the fat removed and sugar added.
    Thanks

  • @markj48
    @markj48 8 років тому

    Hi Hank, which one was used in your No Edge T-shirt? Went to a movie last week and forgot I was wearing it, when the lights went down that sucker really lit up.

  • @zacharymiller962
    @zacharymiller962 8 місяців тому

    I did not expect hank green to be the one to answer this for me

  • @Parralyzed
    @Parralyzed Рік тому +6

    You just run 'em over, that's what you do

  • @watainiac
    @watainiac 8 років тому +6

    This video makes me want to go to a rave really bad.

  • @batjimadventures2201
    @batjimadventures2201 4 роки тому

    Aw cool I just found a old glow in the dark bouncy ball and was wondering how they work but this has answered my question

  • @Lovestruk007
    @Lovestruk007 8 років тому

    I can just picture little Hank recreating the constellations on his ceiling, or else making up his own like one for John called 'Dorkus Major'

  • @alexriver4997
    @alexriver4997 8 років тому

    That was an epic episode!

  • @Comedy4cast
    @Comedy4cast 4 роки тому

    Is a phosphor limited to one column of activation? Or can a phosphor that glows by absorbing energy from light (photoluminescent) also glow from exposure to tiny amounts of one of the radioactive sources (radioluminescent)?

  • @Feynman.R
    @Feynman.R 8 років тому +18

    But how they work? How light (photons) enters the toy and why toy glowing for long time? I need physics answer, not just chemical name of stuff.

    • @ammo1317
      @ammo1317 8 років тому +13

      As light (or other energy) enters it excites the electrons, making them move to a higher orbital tier. Over time the electrons settle down, releasing their energy as visible light.

    • @deividux12
      @deividux12 8 років тому

      would heating up the material would also make it glow?

    • @ammo1317
      @ammo1317 8 років тому

      TheCodeAlive
      Depends on the material, in theory yes, however heat tends to mess with chemical properties.

    • @EebstertheGreat
      @EebstertheGreat 8 років тому +5

      +TheCodeAlive No, because the compounds used are photoluminescent, not thermoluminescent. When a photoluminescent atom absorbs a photon of (approximately) the correct frequency, it "excites" one electron, increasing its energy and raising it to a higher energy orbital. Some time later, the electron will "relax," falling back to the lower energy orbital and releasing a photon of the same frequency. Though most photoluminescence is relatively fast and called "fluorescence," it can rarely proceed very slowly in a process known as "phosphorescence" (named after white phosphorous, even though technically that is not phosphorescent but chemoluminescent). The mechanism behind this is very complicated.
      In a phosphorescent atom, the excited electron has a high probability of "intersystem crossing," in which its spin changes to be parallel to the spin of its partner. Normally, electrons in an orbital are paired up, with the two members of a pair having opposite spins. This is due to the Pauli exclusion principle, which states that two particles cannot occupy the same quantum state; so if two electrons are otherwise identical (in the minimum available energy state), they must have opposite spin. When one electron is excited, this pairing is generally still preferred, so the spins typically remain parallel, a so-called "singlet state." However, because the excited electron is now alone in the higher energy state, it is possible for it or its partner's spin to flip, forming a "triplet state," but this is usually not energetically favored. In a very few compounds or solutions, this type of flipping may actually be favorable, usually due to relativistic effects in non-circular orbits (the new electron may favorably align its spin with the angular momentum in the non-circular orbit), especially if there are magnetic species in solution. When this happens, the electron is "stuck" in a metastable state, because it cannot relax back to the lower-energy orbital without first flipping its spin again due to a thermal or quantum fluctuation. Even this extremely "slow" relaxation typically occurs on the millisecond timescale for most phosphors, but in the case of zinc sulfide, strontium aluminate, and probably a few other compounds, it can take minutes to hours on average. Because this is a probabilistic process, some atoms may relax very soon by pure chance, while others will take quite a while, which allows a large sample to luminesce continuously (albeit at an exponentially decreasing rate) for quite a while.

    • @EebstertheGreat
      @EebstertheGreat 8 років тому

      ***** In the case of visible light emission, I think that is the dominant cause, but there are lots of ways black bodies radiate. Actually, a black body radiates in _every_ possible mode, including molecular rotation and vibration, electronic ejection and recombination, internal and external electron transitions, nuclear rotation and transitions, dipole-dipole and dipole-monopole radiation, etc. Basically any way charged particles can move can emit radiation. How often each of these happens at a given temperature and the energy released by each are determined by the black body spectrum.

  • @nugmman
    @nugmman 8 років тому +1

    What is happening to the phosphor when the light hits it that causes it to re-release the energy as visible light? What happens to the photon when it gets absorbed?

  • @weylin6
    @weylin6 8 років тому +3

    The reason HOW these compounds store light for so long would have been far more welcome than telling us what we already know and could find with 2 minutes of google searching!

  • @juanandres961
    @juanandres961 8 років тому

    I have 20 years old u have tons of glowing stars :D thanks guys i really like this episode

  • @tiiiimmmmmm
    @tiiiimmmmmm 8 років тому +2

    Tritium is still very popular, and probably the only current solution, in night sights.

  • @TheGolfdaily
    @TheGolfdaily 8 років тому +1

    I still don't get it . How exactly can a material get energised by light and how does that energy becomes light again?? Is the light it emits the same light as it absorbed? I guess not but if so, does that mean the lights kind bounces around with-in the material and only a small amount of it escapes over time?

  • @lazyKong64
    @lazyKong64 8 років тому

    Wow i've always wanted to learn about this. Cool !

  • @Bloodmoon1969
    @Bloodmoon1969 8 років тому

    amazing video 👏🏻👏🏻

  • @czechmex88
    @czechmex88 8 років тому +15

    Why does it hurt so bad when I stub my toe?

    • @shadowflamegxkryptic
      @shadowflamegxkryptic 8 років тому +3

      Because you're not paying attention.
      Stop being a cheapskate.

    • @markg7030
      @markg7030 8 років тому +2

      Your toe sends a chemical message to your brain via your nervous system. Its hurts so bad to teach you a lesson not to do it again.

    • @philosophia7897
      @philosophia7897 8 років тому +7

      The tips of toes and fingers have a higher density of nerves.

    • @theblackboyjoe
      @theblackboyjoe 8 років тому

      What I would like to know is why it hurts worse when your tired.

    • @EmbraceTheThunder
      @EmbraceTheThunder 8 років тому +8

      You just rammed your toe into something.

  • @hazleslife
    @hazleslife 8 років тому +1

    I was starring at my ceiling that has the glow-in-the-dark stars when I got the notification for this video

  • @MusiCaninesTheMusicalDogs
    @MusiCaninesTheMusicalDogs 8 років тому +1

    If you break that watch, could direct contact with the radio luminescent pointers be harmful?

    • @miguels1334
      @miguels1334 8 років тому +1

      +

    • @frankschneider6156
      @frankschneider6156 8 років тому +1

      +L Galicki,
      in principle yes, but there is not that much radium in it and the upper layer of dead cells of your skin provide some protection so you won't die of radiation within hours ;->, but you shouldn't lick at it. Incorporation is pretty nasty.

  • @michaelinzo
    @michaelinzo 8 років тому

    3:10 what are those?

  • @Soliloquy084
    @Soliloquy084 8 років тому +2

    My green stars are still on the ceiling at my parents' house.

  • @shadowwolfcat13
    @shadowwolfcat13 8 років тому

    When I was younger, my parents didn't want to glue stars to the ceiling, so they decorated my room with glow-in-the-dark starry wallpaper. ;)

  • @kimnorae6982
    @kimnorae6982 8 років тому

    Excelente vídeo, muchas gracias por el magnífico trabajo.

  • @bjornmu
    @bjornmu 8 років тому

    I've read that this strontium aluminate that I suppose my watch uses is doped with europium and dysprosium, is that right? If so I probably have something like a nanogram of each :-) They glow all through the night if they've been exposed to strong enough lamp or sun light

  • @markkuilomaki1173
    @markkuilomaki1173 3 роки тому

    I've always been interested about glow in the dark stuff.

  • @neezdutz3689
    @neezdutz3689 6 років тому

    can GITD things absorb any kind of energy to store light energy in them??

  • @andrewc7770
    @andrewc7770 8 років тому +10

    Those stars were the shit

    • @No-rj7mj
      @No-rj7mj 7 років тому +1

      Drew Caylor exactly

  • @mongislort6440
    @mongislort6440 8 років тому +22

    Why is there a Charmander in my toilet?

    • @SrLupinotuum
      @SrLupinotuum 8 років тому

      Stop using the pokemon incubators as a toilet......

    • @w1q2e3r4t5
      @w1q2e3r4t5 8 років тому

      Put your phone down and stop playing Pokemon Go for a few minutes.

  • @N....
    @N.... 8 років тому +6

    Why does shining a blacklight on them charge them up so much faster but then they also glow for a shorter amount of time?

    • @snipepalerider83able
      @snipepalerider83able 8 років тому +8

      A good question that highlights an over generalization Hank makes. The teeth thing is fluorescence not phosphorescence.

    • @frankschneider6156
      @frankschneider6156 8 років тому

      blacklight results in fluorescence and and doesn't evolve a meta-stable excitation state, while phosphorescence does. So in short: fluorescence immediately transforms light of higher frequency (UV) into light of lower frequency (visible), while at phosphorescence you populate a meta-stable state over time with light of a given frequency, which is emitted at the same frequency over time as the electrons drop from their excited meta-stable state back to their ground state.
      As a result phosphorescence shows this typical "after glow" in the dark, if you shut down the light, while fluorescent material does not, when you switch of the light source. if you switch of the UV light, it stops emitting.

    • @N....
      @N.... 8 років тому

      Frank Schneider That isn't my question. Take two identical glow in the dark stars, and charge one with regular light and the other with a black light, for the same amount of time. The one charged by the blacklight instantly lights up, and the one charged by normal light takes a while. Then when you remove the light sources, the blacklight charged one dims very quickly while the one that absorbed normal light lasts much longer.

    • @frankschneider6156
      @frankschneider6156 8 років тому +1

      Nicholas Braden
      Yes it is. Phosphorescence involves a meta-stable state and therefore has this after glow, fluorescence does not, and therefore immediately stops when the light source is switched off.

    • @N....
      @N.... 8 років тому

      Frank Schneider I am not observing an immediate stop in either case.

  • @Apurbo_D1
    @Apurbo_D1 Рік тому

    How is Hank present in every single useful scientific video?!?!?

  • @sweetdrinks9808
    @sweetdrinks9808 8 років тому

    sci show! how do grow toys work such as orbeez or those kind sold at dollar tree?

  • @cidshroom
    @cidshroom 8 років тому

    I wish you'd do little animations showing out the photons were absorbed and re-emitted, and how the chemicals react to make light.

  • @brandoncornfields2860
    @brandoncornfields2860 8 років тому

    I like this guy better than the other

  • @tanyapaterson3142
    @tanyapaterson3142 4 роки тому +1

    Thanks 👍🏻

  • @sephyrias883
    @sephyrias883 8 років тому +1

    What is the psychology behind "comfort" or what we define as "comfortable"?

  • @Glendragon
    @Glendragon 8 років тому

    how can you check how much is left of a battery by squeesing it?

  • @IskandarPendragon
    @IskandarPendragon 8 років тому

    How exactly is that energy stored in the phosphorus material

  • @probably_seohyun
    @probably_seohyun 8 років тому

    *SciShow I want to know how water goes in to your ear and how do you get it out*,because in my experiences on beaches is you take a *long dive theres water inside your ears*,*while when you dive for a short time it doesn't*

  • @carlosavila6744
    @carlosavila6744 8 років тому

    top 10 youtubers and science behind their success

  • @jaimechiarini8782
    @jaimechiarini8782 8 років тому

    Thanks, Hank! You're like a modern day Beakman. :-) Perhaps you can answer a question he never answered for me: How do hair spray and hair gel work?

  • @Alex-yd8hj
    @Alex-yd8hj 8 років тому

    0:11 We need to bring this back lol

  • @TheHaviocdarkmoon
    @TheHaviocdarkmoon 8 років тому

    hey i got a question for you guys what is a micro climate exactly ?

  • @Tina_Xina
    @Tina_Xina 8 років тому

    I noticed an extremely quick on-off cycle among the fireflies a few nights ago.

  • @dhawthorne1634
    @dhawthorne1634 8 років тому

    bis(2,4,6 trichlorophenyl) oxilate; 9,10 diphenylanthracene; diethal phthalate; sodium acetate and hydrogen peroxide.
    One of my favorite chemical reactions.

  • @ItsZorn5620SON
    @ItsZorn5620SON 8 років тому

    man just the other day I was wondering if you guys did a video about this

  • @jenovapooh
    @jenovapooh 8 років тому

    My stars are actually still on the ceiling of my childhood room at my parents' house. I used the blue tack and it won't come off their ceiling, so they just left them. :D

  • @ganaraminukshuk0
    @ganaraminukshuk0 8 років тому

    I had two theories to this right before I watched this: radioactive compounds and energised electrons emitting photons as they fall back to lower energy levels. Looks like I was on the right track.

  • @editflores
    @editflores 8 років тому

    Hey! Y didn't u talk about the sights on guns? They glow pretty powerful.

  • @HealthfulPursuitTheKetoDiet
    @HealthfulPursuitTheKetoDiet 8 років тому +4

    Looks so cute :)

  • @pickahyt5488
    @pickahyt5488 5 років тому

    I have a question: when do glow in the dark stuff (made with liquid) stop glowing?

  • @blindjoe8300
    @blindjoe8300 4 роки тому

    Where are phosphorescent colors on the spectrum? Is it diff than just green like UV is different than purple

  • @sarahsherer4939
    @sarahsherer4939 5 років тому

    What about color changing nail polish from temperature change

  • @SoraFan23
    @SoraFan23 3 роки тому

    As a kid I always enjoy having things that glow in the dark.

  • @k-874
    @k-874 6 років тому

    I don't have that much,but i got glow in dark toy cars. *Childhood flashbacks*

  • @leerman22
    @leerman22 8 років тому

    What is a plumbus for?

  • @jerotoro2021
    @jerotoro2021 8 років тому +1

    But where do the photons come from? Does the material collect them and emit them later? Because photons are actual things, and if actual things are being thrown off of the material constantly, eventually it should run out... where does it come from?

  • @googoosmd
    @googoosmd 8 років тому

    Episode idea: Why do we like solving puzzles?

  • @BerylLx
    @BerylLx 8 років тому

    THANK YOU

  • @Marvolo
    @Marvolo 8 років тому +1

    I still have phosphorescent stars on my ceiling. I refuse to grow up!

  • @blockchaaain
    @blockchaaain 8 років тому

    Radioluminescence is great because it is basically permanent. Used in tritium gun sights for example.

  • @theperpetual8348
    @theperpetual8348 8 років тому +11

    also, Scorpions glow under UV light.

  • @vjm3
    @vjm3 8 років тому

    So, wait. Do the Phosphors take in the light from the sun (or wherever), which excites the molecules to vibrate (due to their unique chemical makeup), which so happens to emit a wave of energy within our visual spectrum as a sort of energy byproduct? Is that how it physically works? Or is there something happening that's not so intuitive?

    • @wierdalien1
      @wierdalien1 8 років тому +1

      the electrons within the molecule do that not the molecule itsself though the shape of the molecule determines what frequency of energy is required to lift the electrons

    • @vjm3
      @vjm3 8 років тому

      Alistair Shaw
      Thank you! I figured it was something like that. Really neat.

  • @thewordshifter
    @thewordshifter 8 років тому

    we just put the glow in the dark stars on my son's ceiling....I bought them and my husband took it upon himself to make an accurate representation of the sky...utilizing a compass app, star projection, ruler, etc. haha.

  • @Ermude10
    @Ermude10 8 років тому

    When he mentioned the stars, I couldn't help but look at my stars on the ceiling.

  • @Shemdoupe
    @Shemdoupe 8 років тому

    Anyone else notice the color changes to Hank thoughout the video? ? Looks like he's glowing ;)

  • @Iwilldisagreewithyou
    @Iwilldisagreewithyou 8 років тому

    Hey so do fireflys use chemilumescence?

  • @asebaninja
    @asebaninja 8 років тому

    I still have the glowing stars on my ceiling they've been there fo 10+ years! Like an old friend.

  • @edi9892
    @edi9892 8 років тому

    Wonder how long the radioluminescent coatings last (they have a rather short half-life).

  • @barbearian3054
    @barbearian3054 8 років тому

    I'm 19 and I still have those glowing stars on my ceiling

  • @koreycurtis7876
    @koreycurtis7876 8 років тому

    what is the black chemical in a carbon battery and what can it be used for @SciShow +SciShow

  • @davidbuschhorn6539
    @davidbuschhorn6539 8 років тому

    My watch has Tritium dots for the numbers. Before the half lives caught up to it, it glowed so bright, all night, that I had to put it face down on the bedside table.