Fantastic Phosphorescence!
ฝัง
- เผยแพร่เมื่อ 22 พ.ค. 2024
- Glow-in-the-dark. How does it work? In this video I show a bunch of phosphorescent samples and explain the difference between fluorescence and phosphorescence.
Link to my video about fluorescence: • Fantastic Fluorescence!
If you are interested in more you should search for chromium-activated zinc gallogermanate (Zn3Ga2Ge2O10 : 0.5%Cr3+). They glow invisble in near infrared but can glow for up to two weeks in the dark!
Hopefully the scientists will invent something similar that glow in the visible range for so long. I would definitely pay well for a phosphor that could glow on my watch for such a long time.
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You make the most professional and interesting science videos on TH-cam :D
Never heard of glow in the dark lures. was quite impressed by the light traces on the marbles. You describe the process correcty for both fluorescence and phosphorescence.
Not sure what the glow-in-the-dark lures are useful for. Maybe deep-sea fishing or in really murky waters :) Thanks for watching!
Thanks Brian another excellent video.
Very Good Info you give. Keep making such good videos.
Wow. My jaw dropped at 3:58. That was surprisingly beautiful. Always thrilled to see a new upload from you!
I was actually surprised myself. The marbles are a little weak and unimpressive under a blacklight but the bluray laser gave them a whole new dimension reminding me of meteors or gas planets :)
Thanks for watching!
I LIKE YOUR VIDEOS SO MUCH! CONGRATS!
I was reviewing Phosphorescence and fluorescence for my analytical chemistry course and in less than a minute, you have clearly explained the difference between the two, where my textbook took a whole page. Thanks for the great video Brian!
Revanchist8525 Thanks for watching and commenting :) Good luck with the study.
Hello there! I'm actually not too much into chemistry, but since I saw your videos randomly on youtube, I found them to be very entertaining! Especially the way you talk and explain is really enjoyable while watching your videos. Thanks for the uploads, I am just about to view all your older videos since I've just joined you some days ago ;) Keep up the great work and greetings from Germany.
Welcome aboard! And greetings from Denmark :o)
I find science fascinating and fun and try to show why in my videos. So I'm really glad to hear that you are entertained by my videos although your not usually into this kind of stuff.
It's always a pleasure to finish and upload a new video. Thanks for the positive responses already!
This video is about phosphorescence - a follow-up video to my video about fluorescence which is closely related.
Filming the glow is not easy but hopefully I managed to show how beautiful phosphorescence can be :)
I wonder if you know why when a regular light bulb glows for a good 10 minutes in the dark after being switched off
love your videos i just really wish you posted more offten
ID GAF I believe you are thinking about one of the newer energy-saving fluorescent bulbs? They have a white coating of a phosphor on the inside that fluoresces brightly when the bulb is turned on. But they can also have a very weak phosphorescence for some minutes after the bulb is switched off.
MrMinecrafter49 Thanks! I wish I did too :o) But I aim for quality in my videos and that just takes time - a lot of time for an amateur like me.
Even if I quit my dayjob I would struggle to finish a video like this in a week. But I have considered making shorter videos that still could be interesting and would take less time to finish.
brainiac75 Maybe to get some more videos out, you could do some shorter videos on "easier" themes, that don't take too much of explanation.
By the way: I just found your channel recently and i really like your videos and find it quite interesting, when you explain these things.
And a little question: In which country do you live, because you translated some german words in the description of the fluorescence video, so i was wondering if you actually speak german (i am from germany) :D
Great video, looking forward to the next one.
Interesting as always.
Thank you! my science class is doing physics and i didnt understand how this worked this really cleared things up for me :)
I love your videos! Thanks!
Very Helpful video....Thanks alot.
the marble part blew my mind
The concept of spin on electrons always has baffled me,especially taken with wave particle duality etc., great video as per usual.
I'm also baffled when reading about quantum mechanics. Normal logic just can't be used...
The laser demo was really interesting.
I agree
The laser and marbles was awesome.
Have you ever played around with tenebrescent materials?
Not really, but tenebrescence could be a subject for a future video - thanks :)
brainiac75 Your channel is great man. You seriously need more subscribers, maybe these videos could be used for school projects :P
Tenebrescent?→No. What are They?
It's always a pleasure to watch to watch your super-interesting videos. Please, post more! By the way, are you really Norwegian? Kind regards.
Thank you! I'm from Denmark so you were close :)
The trapped electron solves my fermiball/aether structure theory problem. Great insight Brain. Thanx
This is actually quite cool, I have never seen anything glow red like that. I always thought that phosphorescence was green
The green and cyan last the longest so they are most common. That red is absolutely fantastic in real life. The red glow when it fluoresces is really strong. Much stronger than it looks like on video.
brainiac75 this was the best reason for my phone going off in school. Mid class, in the middle of a French test.
Thank you for the video :)
Its really fantastic phosphoresence
4:00 made me feel warm inside
Great vid bro, please make more and more....... ;-)
Great like always :) That laser part was really impressive, I totally forgot that those blu-ray lasers exist and that you can do that with them. I have to try that out soon and show it to my brother, he is going to love it :D
Blu-ray lasers and phosphorescent materials are just a fantastic combination. Please go ahead :)
Be careful if you do buy a laser. A lot of the lasers on amazon.com or similar are way overpowered. You buy what you think is a safe 5mw blue laser that actually outputs over 50mw. What makes blue ray lasers dangerous is that they do not appear bright to our eyes. Make sure to buy from a reputable source and even with a tested 5mw don't shine it in anyone's eyes. I may seem paranoid but I know someone who got permanently blinded by a 1.6 Watt laser pointer. Also please, if you buy a green laser pointer, MAKE SURE that it has an infrared filter. Just google "Laser Missing IR Filter" to see why it is important. Just to be on the safe side, BUY SAFTEY GLASSES FOR ANYTHING OVER 5mw. Make sure its from a reputable source (like Eagle Pair) not cheap 5$ glasses. Your eyes will thank you later. All that said, lasers are great fun :)
Davy Zeng Good to know, thanks! I have some really weak lasers at home already but I've luckily never had anyone try to point them at peoples eyes. I'm always very couscous about that. I've been thinking on getting a more powerful one soon just for some fun and testing things out so this info will come in handy so nothing goes wrong. :)
Great video! Is it possible to embue metals via smelting with some of these? Not by painting. It would be really cool to make a Blue glowing sword like "Sting" or one ring to rule them all.
terrific!
what camera are you using - your extremely low light footage looks great
Thanks! I was really pushing my camera to the limit in these shots...
I use a six years old Canon HF10 which is nothing special (but I really like it). The first shots were horrible but when I put it in its 'Cinema-Mode' it did alright and accepted that most of the picture should be totally dark.
And after a little polishing in my video editor the shots were better than I expected :)
Cool :D Keep it up
Fantastic ₋LED- luminescence!
I love science
Hello, your vid is interesting, can you specify the materials in all colors at 2:16? Thanks
thats cool
Cool!! ;)
I like glow in the dark materials please add more funvand exciting material
Background sound from Trives Vengance ;-)
I really like this video and the one about Fluorescence.
But there's one thing I don't get; isn't strontium radioactive, too?
Are there any flourescentic or phorsphorescentic materials that aren't radioactive on some level?
And why are those materials used on things like watches you carry around with yourself? How dangerous is it to keep those things?
+Anastasia Cooper
Thanks, natural strontium is NOT radioactive. You may be thinking of strontium-90 that is released in nuclear explosions or reactor accidents. That is highly radioactive but not natural occuring.
Most fluorescent and phosphorescent materials are not radioactive - including the common materials used in watches today.
+brainiac75 thank you so so much for your answers on all of my questions :)
You definitely helped me to understand a bunch of things.
Great channel, keep it up! You've earned yourself another subscriber :D
Anastasia Cooper Awesome! Welcome aboard :)
Anastasia Cooper everything is radioactive on some level
Hi, would you happen to know what materials are safe for tattoos? What creates a medium-strong glow in the dark without UV?
your a god
Good, but still human :) Thanks for watching!
3:45 i have same but white fixture.
See you next month
You should see if you could get in touch and see some really dangerous alloy like uranium but probably not but also do a explanation video of uranium or better yet lawrencium I really wanna know more about reactive metals and elements plz and thank you
You have no idea... -.-
After Californium, the elements are useless. They are pretty similar and all have very short half-lives. He made a video with a bunch of radioactive things
Imagine if you could have a true UV laser invisible to human eyes? You would be able to draw pictures on phosphorescence screen then, almost like in a cathode ray tube!
You can buy them or build one yourself using a UV laser diode and a driver. Not very hard actually. Also, consider buying a purple laser (405nm ones, not blue ray ones that produce 445nm light), they are just 5nm above near UV light.
We can make X-ray machines; we can make invisible UV lasers too. This would be an interesting form of art
Gooscar Yeah, in fact, invisible FUV (far UV) lasers are used currently in photolithography machines for sub-micrometer transistors in chips.
Tritium is used for watches phosphorence purpose. I know, it sounds strange, but it is.
Edit: Oh, you said it. My bad!
its also used in military grade sights like the ACOG
Hi Braniac can u link me that uranium glass because i think it is cool and a would like to buy one
+Dominik Deutsch
Hi, uranium glass can be found in many antique shops or at marketplaces. Otherwise you can search eBay for 'uranium glass'.
Brainiac75 oke thanks
I have a small tritium filled tube but only lasts 12 years , I thought you said in the video it lasts forever ?
I have not made a video about tritium tubes?
Hello Briannnnnn! :] Can you make video about Tritium?
Hi, I'm working on a video with some 'weird' radioactive samples right now. Tritium is not in my collection yet though, but I'm sure it will be at some point. So yes, I will make a video about tritium sooner or later :)
Where did you purchase those europium powders?
The strontium aluminate powders are from eBay (stores.ebay.co.uk/glowinthedarkshop).
Nice edifice dude^^
Radioactive lume isn't so much extreme as it is convenient. Radium paint lasts for multiple lifetimes and only needs to be repainted with phosphorescent paint every fifty years or so (perhaps less if luminescent materials resistant to radiation deterioration are discovered) , and the added radiation to yourself is negligible. Less so for tritium, though tritium can hardly be said to last a lifetime.
I was always told watches had radium in them...
What are those pins used for at 2:50?
They are spare watch hands that were used back in the good old days when watches were actually repaired instead of being thrown away ;)
What are they made of?Isn't it dangerous to repair?
Chan Hien The paint on the watch hands contains a radium salt so yes I wouldn't wear a watch with radium hands or try to repair it :)
Thanks for the infos.
Any rock samples that do this? I have a few willimite/franklenite samples that do it quite well
+hermesbowser11
Willemite fluoresces very well. At some point I need to start a collection of fluorescent mineral. They are impressive.
But many of them need short-wave UV-light that I don't have.
Phosphorescent minerals are much more rare. Some calcite samples from Texas are known to have after-glow.
+brainiac75 Fluorite glows really well [there are mineral samples of this in our local museum that glow in a UV light. Maybe fluorite is the same as willemite?
Oakleaf700 No, there are actually many minerals that are fluorescent. Willemite is a zink silicate mineral while fluorite is calcium fluoride. Here's a nice article about fluorescent minerals: geology.com/articles/fluorescent-minerals/
brainiac75
Ok thanks.
if you add strontium aluminate powder to glass would it glow?
+Shartline McDingleberries
Yes, that should work. I don't know what kind of temperature the strontium aluminate can withstand so it may need some careful temperature control but glass molding shouldn't be a problem with SrAl.
brainiac75
neat. Thanks for the answer and also awesome channel!
You should do a video on Lego, since your from Denmark haha :D
*well a whole video
I think the whatched actually use tritium even thou it radioctive it can glow up to ten years
what is the difference between strontium aluminate and europium?
In what context? Europium is a metallic element used to dope the compound strontium aluminate to be phosphorescent.
Brainiac75 , wow, that was a perfect answer, LOL, thank you
Brainiac75 , so strontium aluminate by itself does not glow? It's only the europium that glows? And does pure europium glow without phosphate?
I should watch the video on fluorescence, I just me watch this video, You're great, keep making videos, thank you
scoby Pure strontium aluminate is not phosphorescent/glowing. It needs to 'doped' (tiny amounts of impurities) with eg. europium. Pure europium cannot glow either - unless heated to be red-hot :D
Why are stamps phosporecent?
Not all are. The shown were probably made this way to easily tell faked from real ones - in the same way that many banknotes have fluorescent markings.
Fantastic Phosphorescence!
~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.
OK, So I was cleaning my teeth today and when I clean them I use 44% Carbamide Peroxide along with a dental curing light (I think this falls under the UV spectrum). This method does in fact whiten my teeth. Nevertheless, when I was cleaning them today I saw something glowing red in my mouth. So when I pulled it out it was a piece of lettuce from a salad that I had recently ate. Why was the lettuce glowing under the light?
Lettuce is green due to a pigment called chlorophyll. Chlorophyll can actually fluoresce with a red color like you experienced. Here's a picture of it:
en.wikipedia.org/wiki/Chlorophyll_fluorescence#mediaviewer/File:Fluorescence_of_chlorophyll_under_UV_light.jpg
brainiac75 Thanks! I know about Chlorophyll cuz I drink it in my tea. It supposedly helps prevent Cancer + Tastes like mint. I didn't know that it would have a Fluorescence effect under the light though.
I've got a Tritium keychain. :D
Fileffel I really need to buy one too. It would expand my radioactive collection with a new isotope and would make for an interesting video...
How much is a blue ray laser.
+XpGamers Monicleman
They are dirt cheap. Search eBay for '405nm laser pen' and a lot of choices should pop up.
This one is $1.77 including shipping...: www.ebay.com/itm/New-Powerful-Blue-Violet-Laser-Pointer-Pen-Beam-Light-5mw-405nm-Lazer-DP-/172117482180?hash=item2813005ac4:g:MtsAAOSw~OVW071a
Brainiac75 /What is the most expensive colour?
XpGamers Monicleman Probably an odd wavelength I haven't even heard of yet.
Of the commercially available laser pointers the yellow (593.5 or 589 nm) is the most expensive.
Brainiac75 Ok!
Also peanut burger glows in the Dark
Peanut butter + blu ray laser.
1:37 SPOOKY SCARY SKELETONS :D
ok wtf you cant say 3:50 isn't satisfing
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