Added: 3 years ago
From: periodicvideos
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  • Professor Phil Spector

  • Green lasers are not pulsed generally, most are continuous wave.

  • @TheBrando132 You're arguing with the guy who has a Phd?

  • @AppleAssassin Not arguing, just correcting.

  • Comment removed

  • that's a cool present!

  • I recently discovered idiotium and imbecilium. Whare are these on the Mendelev table?

  • @dvamateur

    lol nice try, i nearly googled it then i realised LOL

  • I used to watch these videos until I took a magnet.

  • i have a neodymium filter to my telescope

  • Lasers and magnets, what's not to like about neodymium?

  • All this guy has to do to cheat in a test is look at his tie.

  • i think his mother-in-law can't wait to be 79 xD

  • @mathbrmath id prefer 78 ;)

  • @mathbrmath what about 92?

  • nice tie good for cheating

  • i wonder if he has a wife?

  • so.. where do we get to see all the color changing nonsense dudes talking about in the beginning.. i was like.. this might be intersting- then.. disapointment.

  • I want one of those magnets

  • I'm guess that the 4 dislikes came from jocks that accidentally watched the video while searching for 'Greatest Football Touchdowns.' Or people who don't think science is cool.

  • the guy in the black shirt kept saying neodyNIUM Dx it was driving me crazy!!!

  • neodymium yag, thats the yttrium-aluminum garnet, yeppppp

  • I like the prof better he makes it's easer to hear his voice

  • the proffesors voice is soothing >.<

  • fucking miracles!

  • are their any theorys in how magnets work????

  • @alewisgb There are more than theories, we know quite exactly how magnets work. Several materials exhibit microscopic electric currents distributed throughout, and if a sufficient amonut of these currents is aligned, they form a macroscopic magentic field. An existing magnetic field can align those currents and magnetize the material. If the currents remain aligned after the external field is removed, the material becomes a permanent magnet.

  • It's Neodymium and not Neodynium!!!!

  • Anyone notice the crazy-hair dude's Tie? Its the periodic table lol.

  • I find it ironic how neodymium is a rare earth metal while its the 27th or something most abundant metal on earth

  • SO THAT'S HOW MAGNETS WORK.

  • Question? So im curious, by close disection of a "Glow-worm" Is this the conductive material that in fact make's the glow and pulse's of a glow worm's be-hind? Although i do not attend college, i am very interested.

  • @Brian272

    No, those are proteins that make that light.

  • i have a very small neudymium disc magnet, and that thing is POWERFULL, phew

    you can put it on a large thick wooden table and find where the nails/screws are inside the wood from where the magnet goes

    i keep them tucked away because i now have a relativly useless TV that is useless BECAUSE of the magnets, haha

    -.-

  • @kionay lol - hey i screwed up my tv the same way. you know you can fix it with the same magnet. just move it quickly back and forth pretty close to the screen. it will spread the colors back out :P

  • They say when an old man dies, a library is burned down. Hopefully this library isn't burned down =/

  • the most common use of neodymium i know is in headohones for the magnets in the drivers

  • @boscostix42 buy some neocubes there magnets

  • I wish I had some, i have 12 elements

  • @boscostix42 instead of children?

  • @ollie3003 no, i have no children silly, im 14

  • @boscostix42 that explains the sense of humour ;)

  • lol happy birthday . . . not?!?

  • Wow... In the future I would want to give my kids a sample of each element for their birthday.

  • @dominic14061995 I hope you feel your kids are safe with plutonium and francium and fluorine...

  • @mattrules161

    I found it really funny that the only 3 elements you thought was worth mentioning were plutonium, francium, and fluorine.

  • @lastingpain22 well plutonium is very radioactive, fluorine is very reactive, and idk about francium but if its as dangerous as the others i'd consider it worth mentioning myself

  • @mattrules161 It's so cute the way they eat it....O_O...They grew another limb!!!!

  • Neodymium as a birthday present?

  • Lol. Did the professor recently had a haircut.?

  • My laser is argon-argon, and is an excellent shade of blue. :)

  • Those magnets are not completely neodymium, they are neodymium-iron-boron.

  • Definitely some interesting facts. All I originally knew about it was that it can make very powerful magnets. These videos definitely make chemistry more interesting than my school does.

    By the way, on my last birthday, I would have gotten sulfur.

  • my headphones advertise that they have a Neodymium magnet

    what does this mean?

  • it means that the magnet on the backside of the device that is usually a cheap magnet, is actually a quite expensive and rare magnet

  • I have also heard that Smoke Alarms use Americium to detect for smoke in a reaction.

  • Whats that got to do with Neodymium and headphones?

  • they exist on the small table of the 30 rare earth metals

    I just find it strange that they put this all our stuff.

  • Americium emits alpha and gamma radiation; i feel all exposed knowing that its in my house... :O

  • who can make a close up and look you in the eye the camera man can the camera man can ha ha that is cool

  • Neodymium is one of my fav elements too, because they make SUPER magnets! :D

  • The camera man is a kiwi!!

  • finally we see the camera man

  • WHAT? how do u turn infrared into green? that increases energy of the photon? how do they do that?

  • In a DPSS Laser (as shown in the vid) is a pump diode with 808nm (infrared) and two crystals. The first crystal is a Nd- YAG crystal which turns the 808nm to 1064nm (also infrared). The second crystal doubles the frequency of the wave to 532nm which is green.

    And this lasers are normaly CW lasers (continous wave) and they are not pulse as the told in this video

  • It's absorbed and reradiated, like fluorescent lights where Hg vapor emits UV, and the phosphate reradiates it as visible.

  • Comment removed

  • Actually it is Nd:YV04 which they use in green DPSS lasers.

  • i once knew a guy who put two massive neodymium magnets with one in each pocket they attracted to each other and came together "right where it hurts"

  • i fell so sorry for this man.

  • @laurdy

    > he's no longer a guy

  • @laurdy omg!! lol did he live?? XD

  • @laurdy i know a guy who swalloved a big one and played with it on his stomach .....he couldnt get it of though

  • @Bjo15 Swallowing neodymium magnets is extremely dangerous and can easily kill you, as they can pull through the gut/intestine lining. NEVER EVER SWALLOW neodymium magnets.

  • @laurdy ouchy they are strong and can pinch very hard,.

  • @laurdy Why didn't they come together earlier, i.e., in any moment they were the closest before being introduced into his pockets.

  • @DerAnstifter prbably he was thinking about it and put them aside very far from eachother ..... but he wasn't thinking about what would happen after they colide

  • @DerAnstifter probably because he was strong enough to keep them apart...i dont know for sure though thats just a geuss.

  • @laurdy i think he got "the thing " severed didin't he?

  • @laurdy

    THAT FUCKING HURT JUST READING ABOUT IT

  • @laurdy i know why you said "knew a guy" because after that he was not a guy anymore

  • @laurdy And after that accident, the guy's new name should be Magneto.

  • I've been working on a hypothesis that earthquakes/gravity events affect certain isotopes. I was amazed that he referred to neodymium isotopes being used to measure earthquakes. Does anyone know anything more about this?

  • This video was funny and I like neodymium and hydrogen.

    Great video! :-)

  • I want some of this

    [Ar] 3d3 4s2

    for my birthday......

  • His mother should be thankful, for my 14th birthday i got a chunk of silicon

  • If I am not mistaken most of us watching this video have a neodymium magnet sitting in front of us encased in our hard drives.

  • Yep, neodymium-iron-boron ceramic, usually plated with nickel because it separates easily.

  • in short this element is needed to make a green laser(solid state diode pumped laser, in this case) the high power ones are indeed pulsed but he is incorrect about the smaller ones, they can and do operate in a constant wave mode

  • So that's what makes green lasers.

  • My grandmother turns 94 in two years and I'd like to provide her with the element number 94 as a gift, where would I go to buy a sample?

  • iraq?

  • Comment removed

  • lol isnt plutonium a synthetic element?

  • You should get on a plane, and a soon as you spot a military base certified for storing nuclear weapons you should jump out with a parachute.

    then politly ask the security guards "how much for the Plutonium?"

    "no no no, im not a terrorist. It's for my Grandmother=D"

  • catalogue

  • He's just trying to kill his grandmother!

  • What is the chemical property that make Neodymium+ Fe + Boron a strong magnet?

  • Nd2Fe14B

  • Viewer #10000! I find these videoes extremly facinating

  • i was helping a friend of mine move one time and he had given me one so i stuck it in my pocket and never thought tomuch about it lol, i was walking threw the shop to help him load the work bench and boy did i get a surprise when i got too close to a metal table in there, its stoped me in my tracks thank god my jewls was'nt in betweet the path of attraction lol. I was amazed how strong it was, the next morning i could'nt use my hands for my fingures were so sore from playing with them lol.

  • Neodymium as a birthday present? How sweet! XD

  • I love these videos. fantastic work!

  • awsome keep going guys u rock

  • its funny how the old guy says neodymium

  • Are you sure he said permanent magnet, and not paramagnet? I dunno, it sounded like paramagnet to me, but I may be wrong.

  • Permanent. As in contrary to electrically induced magnets.

  • hmm, they said nothing about the extreme density of Neodymium.

  • i bought an 800lb pull neodymium magnet and used it at the beach...i had at least 100lbs of iron particles within an hour lol

  • Wish I had one! ;)

  • Does neodymium make the strongest permanent magnets?

  • Yeah they do. There was an incident of a child playing with them and they pulled together with so much force it shattered a bone in his finger

  • I also heard that a child picked one up, and then walked past a table that had one on it, and they snapped together and destroyed his hand. According to United Nuclear.

  • This is absolutely fantastic - you are, of course, all bonkers!

  • Happy birthday Marion!

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