The ULTRAVIOLET CATASTROPHE

[@tibees]

I love physics

[@ahmad138]

I adore PHYSICS 💗 💓

[@Astrochronic]

Then you should patronize another channel. Because this girl doesnt get it.

[@Astrochronic]

@@ahmad138 SIMP.

[@ahmad138]

@@Astrochronic why thou?

[@ahmad138]

@@Astrochronic shut the f*** up

[@bloogaming8827]

What's the difference between a board and a plank? Boards can change, but Planck's constant.

[@iwanabana]

boooooooooo

[@MsJonesScience]

yes!! Love science puns

[@physicsgirl]

I award you 10 pun points.

[@bloogaming8827]

Physics Girl Haha! Thank you!

[@rayndraws]

Physics Gir l

[@markjparr]

I live just up the road from Lord Rayleigh's home in Terling, Essex, UK, and it's great to see the recognition of his work, explained briefly, but perfectly. For the record the double noble prize winners observatory, and laboratory is still there untouched, left as he left it in 1919. Keep up the great work, and get the youth fascinated about the physical world.

[@sidkemp4672]

My favorite part of this is Einstein's role in explaining Planck with the Photoelectric Effect, arguably the basis of quantum mechanics. In a sense, Einstein was the father of quantum mechanics, as he clearly was of relativity. Yet many people maintain that he either failed to understand it or rejected it, even though he was one of the core creators of the field and its theories.

[@brianegendorf2023]

Well, as is pointed out..quantum mechanics is weird and unintuitive...and it seems like every time someone uncovers a new level of the weirdness, even THEY have a hard time believing what they just figured out. In some cases, they don't want to believe it, cause what they discover is like being on a map, looking at a state, and you zoom in, thinking..OK..I;ll get to see some streets and buildings, but instead, finding a whole new country that no one has ever heard of. Isador Rabi said, "Who ordered that?" in reference to discovering Muons. But that is often the sentiment when something new and strange pops up in Quantum Mechanics.

[@LendriMujina]

I'd heard that Einstein was opposed to his own findings because he hated the random elements, and was like, "no, there has to be some way to make it precise! Randomness begets superstition!" I don't know how accurate that is though. It's just what I've heard.

[@sidkemp4672]

@@LendriMujina This is way off, Lendri. It takes a single quote from debate where Einstein and Bohr were raising issues _to grow together and learn more about quantum mechanics_ into a lifelong position he never held. The evidence of this? Einstien went on working in QM for his entire life and advanced the field in many ways, such as the theoretical discovery of the Bose-Einstein condensate, which we now make in a lab.

[@LendriMujina]

@@sidkemp4672 So I definitely heard way wrong then. Thanks for clearing that up for me.

[@sidkemp4672]

@@LendriMujina Gladly. And don't feel bad. This misunderstanding has been around for over 50 years. It's one of the myths in popular superstition about science.

[@TerraPupaAbyssus]

I definitely want to start a rock band and name it the Ultraviolet Catastrophe.

[@YTEdy]

I like that, and I'll be your first groupie.

[@Cr1ustacean]

Ultraviolent catastrophe

[@masoncamera273]

Dammit you beat me to it!

[@geraldfrost4710]

The hottest band on the planet! Too bad that light going through a prism thing has been done. For sure you could do your own version of... ... The Ultraviolet Side of the Moon! (I'll let myself out)

[@nmbr1son64]

What's gonna be the name of your first album? Radon Daughters or Chrome Lipstick?

[@veritasium]

Snatoms!

[@hypercoder6577]

Hello there! I love your channel!

[@katzen3314]

What about them?

[@connorblake2927]

IKR I wonder if she had the expansion or the standard glucose set :) Interesting use a hydrogen atom - electron?? what?

[@physicsgirl]

you know it.

[@gamermana9468]

VERATASIUM HIMSELF

[@LookingGlassUniverse]

Yay, I loved this! And the message at the end about being wrong is one of those things people don't like to emphasis about science but it's crucial.

[@number1RabidPlatypus]

Looking Glass Universe both of you guys are great teachers on KZbin!

[@TheTomBevis]

If you can't admit that you're wrong after new evidence is found, then you're wrong. A good scientist will shake the hand of the person who presented the new evidence and thank him for proving his hypothesis wrong.

[@gladitsnotme]

agreed. whenever i meet an atheist scientist i just smile and walk away. everything we know about the earth & universe, from invisible photons and UV rays, to radio waves from deep space points towards "the supernatural" and intelligent life being distinct possibilities.

[@Astrochronic]

and ironic, because she is so wrong though so much of this...lmao Girl brains...

[@Astrochronic]

@@gladitsnotme Good point. Atheists cannot be objective. They have prejudicely discounted an ontologically necessary and sound premise simply to appease their own egos. There is no other reason anyone is an atheist. It is ego worship. Pure and simple. No exceptions.

[@slep5039]

"When you switch a plus to a minus" lol true, or adding a random natural log somewhere to make something line up with the graph

[@drakan4769]

I bet when he made the theory Einstein was like "ok... what if I square c then?... yeah that seems to work I'll go with that"

[@Sam_on_YouTube]

E=mc^2 came from playing around with the algebra of the formulas for special relativity. Special Relativity was one of the 5 major papers of Einstein's Miracle Year in 1905. Another one, which likely seemed to him more of a minor corollary, showed that as a consequence of that theory, E=mc^2. Although that way of writing it is actually just a special case for objects with no momentum and wasn't even the main way he expressed the conclusion. Incidentally, the paper mentioned in this video by Einstein was his work on the Photoelectric Effect, also written in 1905. They have him the Nobel Prize for that one because they didn't at the time award the prize for theory and that was the work he did that had the most practical impact on engineering physics. It was highly controversial and he didn't get the prize until he was already well recognized as the greatest physicist since Newton. When he got it, he said "finally" and didn't even bother showing up to the award ceremony.

[@michaelsommers2356]

+Drakan R Actually, if you don't use the square of some velocity, the units don't work.

[@aajjeee]

If the relation between 2 quantities is logarithmic, the graph will not be eloquent, but using a logarithmic scale will reveal the "linearity" of the relation

[@slep5039]

Drakan R Haha seems about right

[@hp127]

Just revisiting to experience the amazing videos again with Physics Girl. Hope that she will recover from longcovid soon. Hope to see you soon in full swing!

[@janmacek5672]

Hi. I am several years late to the party, but this blonde-blue hair is absolutely flawlessly perfect. I also like the enthusiasm and happyness in these older video. Newer ones are imo more "scientific", more concrete, less broad so the topic is told more precisely and the professional level is higher there, but this older inner fire was just somethin' else.

[@DemPilafian]

Are you blind? Her hair is ultraviolet.

[@JuanRamirez-zk9lt]

Definitely a balance is needed

[@upandatom]

beautiful video :) love the new hair! Purple suits you ;)

[@gustavgnoettgen]

@ADARSH KUMAR BEHERA ?

[@rockyraccoon8270]

It wasn't purple it was violet

[@arundhatighose4936]

@@rockyraccoon8270 ultra violet

[@rahulbasavaraj5958]

Dammm the up and atom gurlll😁😁

[@682tokorima2]

SIMP

[@incongruouswalrus7935]

This is a fun video, but to go deeper only welcomes confusion. 6 Quark formations determine all the atoms in our universe. Quantum Mechanics is difficult to explain to the laymen. The Bohr model of the atom is, indeed, outdated. The electrons do not "orbit" the atomic nucleus, and it takes a few years of physics education to explain why. Planck's number is a number that is taken into account only with the understanding that how it is used is in such a way as to say, "the more we discover, the less we know." Prior to the Hubble discovery of the Andromeda Galaxy, Einstein believed our galaxy was the universe; and he was THE premiere physicist of his time. So I liked the ending of this video. Science is the search for truth. It changes because of new discoveries and calculations. It's a fun ride which many embark, but when it's wrong, Science has no problem admitting it and then moving on to a clearer truth. This video was much better than the crap posted weeks ago concerning "5 easy Science tricks you can use to fool your friends." That wasn't the verbatim title, but rather the direction. Press minds; don't impress for clicks. Thank you.

[@shanefoster2132]

Such an intelligent walrus. Perhaps someday man will recognize the genius of our walrus brethren over that of the dolphins... before it's too late.

[@pouncebaratheon4178]

What do you mean specifically when you say "6 quark formations determine all the atoms in our universe"? You can create any atomic nucleus with just two types of quarks, the up and the down. It's true that six types of quarks exist, but the other four aren't components of atoms, so if you're including them you may as well include the rest of the standard model particles, which brings us to 17. Six quarks, 3 leptons, 3 neutrinos, and 5 bosons. Most of them are important in some way in atomic interactions or nucleosynthesis, except maybe the 4 largest quarks and the two largest leptons and neutrinos (though because of neutrino oscillations you'd end up with all three coming from certain decays).

[@drsonyjoseph2284]

Incongruous Walrus

[@pouncebaratheon4178]

***** You're right! Thank you.

[@CartoonKidOLLY]

don't you mean Rutherford's model of the atom is outdated?

[@theCodyReeder]

Anyone else think she needs to add red to the top of her head with green and yellow part way down?

[@lapatron555]

Please get verified

[@kashfyzul93]

oh my Cody from cody's lab Ur vids r good

[@C0deH0wler]

Meh. Hey, Cody. Meh.

[@chowderstevens9375]

Cody'sLab your videos suck but your comments are worse

[@shakesmctremens178]

I wanna know who the snake wrangler was.

[@ronaldderooij1774]

In fact Max Planck did realise what he did immediately. He felt deeply depressed about it, but did it anyway. He indeed quantified light.

[@TheFranchfry]

This video is excellent, all the way around. Production, ease of understanding, visual aids, humor, seriousness, depth of content, and length. I greatly appreciate the work put into this, Thank You ALL!

[@Art36839]

I hope Dianna finds relief from severe Long Covid. I always come back to her videos and it's awful what's happened to her and that no one seems to care...

[@TR123]

Came for my physics homework, stayed for the hair.

[@sam21462]

1:48 - So, in 100+ years we have moved from the silliness of things being made up of things vibrating like springs to our more enlightened view of things being made up of things vibrating like strings.

[@studentpremium7826]

most underrated comment

[@michaelcherokee8906]

I dont understand what you mean. What was the silliness a 100+ years ago?

[@sam21462]

@@michaelcherokee8906 - She explains it at 1:48 Back then it was postulated that everything was made of very small vibrating springs. Now, the popular theory (String Theory) postulates that at its base level everything is made of vibrating strings. It struck me as funny that the only difference in the two is a single letter. You change a "p" to a "t" and springs becomes strings. How far we have come. 😂🤣😂🤣

[@michaelcherokee8906]

@@sam21462 I guess I was distracted at 1:48 then. Also, I didnt even notice the difference between 'spring' and 'string', I thought you said the same thing twice nd were marvelling at how there's no difference.

[@sam21462]

@@michaelcherokee8906 - The part where it was so easy to think that I had said the same thing twice is the part that I find absolutely marvelous. 100 years of brilliant minds rolling out equation after equation that I will never come close to understanding and in the end they just changed one letter. Please note, this is simply meant as humor and is by no means a correct examination of the situation. In fact, it is a grotesquely distorted examination of the situation. 😁

[@agerven]

One glorious highspeed journey through the history of quantum mechanics. Great and thank you! I'm missing Neils Bohr in the story, but nice to get Lord Raleigh and the ultraviolet catastrophe, i never heard actually something interesting on that before. Very nice and admirable how you jump around like a superexited ultraviolet quantum! Exciting and educational video!

[@pozzowon]

Still one of my favorite videos... So simple, yet so precise explaining such a relevant concept...

[@magicalpencil]

the speedo on my car was broken so I took it to my local quantum mechanics, now I can't find the car

[@sleazybtd]

It might still be broken or it might be fixed. You won't know until you look inside the shop.

[@SanketBerde]

Your speedo wasn't broken, The reading it showed was not relative to your frame of reference.

[@ericp.9497]

You left it parked in a different sample space.

[@ericp.9497]

As was "sample space" my love.

[@locutusdborg126]

You are "probably" looking in the wrong place.

[@daleykun]

Your hair is so dope!

[@John77Doe]

Daley I didn't notice the blue part.

[@HiThere-qu2tf]

ITS SOO COOOL!!

[@TheRipler]

No wonder we missed it, ultraviolet is beyond the range of human sight.

[@thomaschase1719]

Daley I mistook it for the lighting until I saw this reply. The unpredictable and charming nature of people, is it partially influenced by the sub atomic particles they're comprised of?

[@InnovationBlast]

I was literally going to comment this

[@liammargetts]

I'm so happy, I've been given this video to watch for my A levels, to further myself in education I need to watch a KZbin channel I enjoy... Incredible

[@pauligrossinoz]

A refreshingly different way of looking at physics! I wish I could give it 10 thumbs ups.

[@the_sophile]

i will give one like

[@lyrimetacurl0]

You can go on other accounts or share

[@NestanSvensk]

There is some great editing in this video. And the material was really interesting too! I had no idea that Planck's quanta was just a lucky accident.

[@davidb5205]

You know, in light of that really idiotic Cape Town 'decolonize science/science must fall' video that was trending recently, this is a really fantastic episode. Science is much deeper than facts and theories. It is a frame of mind. *When the observation does not match the theory, one changes the theory NOT the observation.* And this is an idea I've carried over to other parts of my life. For example: when someone presents facts and statistics that challenge my deeply held beliefs and narrative, my beliefs/narrative has to change NOT the facts. Because in the pursuit of truth, one should put aside ego, irrationality, and presuppositions for repeatable, observable, and objective answers. And that's something that those UCT students could use in spades.

[@davidb5205]

Anyway, I went on a tangent without really commenting on the video. Loved it. Although it did seem a little jumpier than usual. Maybe I only recently noticed.

[@locutusdborg126]

You are correct, David. Science is methodological naturalism, a way of looking at the world around us.

[@rushthezeppelin]

But you still haven't explained how the witch doctor can call down a bolt of lightning............/sarc

[@geraldfrost4710]

@@rushthezeppelin It's a rule on the list somewhere; don't piss off a witch doctor; they have their ways. "I didn't go to eight years of witch doctor school for nothing!"

[@wren7195]

@@geraldfrost4710 I laughed at this far more than I should've, thanks for making a brighter day

[@sicfxmusic]

Ultraviolet Girl

[@bkbland1626]

Dig it!

[@682tokorima2]

SIMP

[@sakthigeek2458]

This is by far the best video physics girl..I would love to see more of your videos like this by starting from history of science to its present state..Great fan of you by the way..Keep rocking and physicing...

[@gomezalejandrog]

You explained this better than 90% of the other videos I found. Thank You

[@liranpiade4499]

Ultraviolet... Hey, your hair's extremely violet, or, may I say, ultraviolet?

[@MirorR3fl3ction]

The pacing in this video is 10/10! Awesome video :) out of curiosity did you starting making the video before or after your got the new hair colour? :P

[@physicsgirl]

Awesome! thanks for the pacing feedback. Before. purely coincidence. I'm not that good at planning. Also I just love the color purple.

[@johnstoner2]

It looks great!

[@fletchy88]

Physics Girl i love you

[@DabiDavs]

Thanks Dianna, this will help me with my chemistry tests. Nice UV hair!

[@CrankyPantss]

+Warrior Son don't be like that. There are plenty of KZbin channels that invite and welcome comments like that. This isn't one of them. Dianna is an intelligent woman who enjoys physics and has a good time teaching it to the physics-curious. If you don't enjoy her message, why can't you just go elsewhere rather than stay here to insult?

[@jada589]

THANK YOU!! I’ve been looking for a good video that thoroughly explains this for hours. Just in time for my test

[@WinchesterxNL]

As a welder. I've come into contact with blackbody radiation for years now, and I never quite understood it. I've had books explaining it to me, and stuff like that. And sure, in practice I knew what I could do. But now, seeing a video of 5 years ago. I kinda wished I simply looked for a video of the subject, 5 years ago. Of course you had a video on it. And it makes a lot more sense now. Stay awesome!

[@Lolwutdesu9000]

Physics girl, what sort of audience do you make your videos for? High school kids, uni undergraduates, or junior school?

[@physicsgirl]

myself when i was in high school. physics curious.

[@Lolwutdesu9000]

Cool, just wondering :) thanks for answering!

[@epicblade9445]

I like your new hair color. It looks awesome! Great video BTW!

[@sleazybtd]

I'm going to guess her target audience is ultra-religious young Earth creationists.

[@Lolwutdesu9000]

I teach physics in high school. I've taught kids just out of junior school who are already aware of cutting edge science. Granted, this is rare, but it does happen. Some kids are just that passionate about science and now, with the Internet, they can find out about this stuff easily.

[@gnagyusa]

Great video! Actually, the "many worlds" interpretation of quantum mechanics is fairly intuitive. It's pretty much the only one that is sensible. E.g. it's not that the electron gets locked down to a single position when you measure it, but you and your measuring equipment get "entangled" with the electron, so you only observe the electron at that specific location. The electron still exists at its other possible locations, but you can't observe it.

[@metis9692]

No.

[@enderallygolem]

Don't black holes absorb (obviously) emit (hawking radiation) and doesn't reflect?

[@SebastianLopez-nh1rr]

The Ender Golem Yes, but the blacbody is more of a thought experiment, different from a blackhole (although, as you pointed out, they have things in common).

[@BlackBirdJacobo]

The Ender Golem Hawking radiation isn't actually emited by the black hole,. It's just fotons that it failed to absorb.

[@happmacdonald]

+Jacobo Pindado To an outside observer, in every sense the "phenomena" of the black hole did emit the radiation. Also, the exact wavelength of the radiation measured by an observer does match the exact temperature of the black hole (matching the entropy load defined by it's mass) from the frame of reference of that observer predicted by Planck's law.

[@radzewicz]

That's just what Hawkins et al said when they showed that black holes have temperature.

[@UltimateHandler]

I have so much respect for you, PhysicsGirl! :) You're awesome!

[@ernanijunior7963]

Oh, Dianna, you're so adorable and the questions you make us think about are really amazing. Physics is one of my favorite subjects and you explain it with such grace, humour and simplicity, although the complexity of nature.

[@connorblake2927]

OMG She used Snatoms at 1:48!!!!

[@physicsgirl]

nice catch.

[@Mr_ToR]

I've been watching your videos since Derek introduced you in his channel. Nice touch with the snatoms :-)

[@mohammedilyas7561]

Physics Girl

[@AngelusPortillus]

"Science isn't fixed facts", glad you said this. Religious fanatics always try to point out how science can be wrong and I'm always like "well duh."

[@iNuchalHead]

I understand why her hair relates to physics.

[@jinx2873]

This made me fall in love with Physics all over again. Thank you.

[@jwestney2859]

Dianna, I freakin' love your video! I messed in mind-bending physics as an undergrad decades ago. In my spare time I still try to come closer to actually understanding the physics that underlies chemistry and everything else. So why do I love your vid? 1) Great explanations with engaging storytelling. 2) Dry humor. You never laugh out loud, but to an attentive listener, it is hilarious! 3) I can use your vid to show my daughter how to be awesome. Learn science -- it is fascinating and fun. You can be a storyteller, videographer, a teacher, and an active participant in the life of humans in this fascinating universe!

[@thiagomartins4992]

BEST PHYSICS CHANNEL OF KZbin!

[@kowjackyow7585]

You're a treasure Dianna! (Physics 101 lessons are just over so I'm re-watching the old Physics Girl's stuff)

[@rurutuM]

So when am I going to able to use a quantum computer to run crysis?

[@IceMetalPunk]

You can do that now, but there's no point. Quantum computers only surpass classical ones in matters of combinatorics.

[@IceMetalPunk]

***** Not really. There's far more matrix arithmetic and matrix algebra involved in a GPU's work than combinatorics.

[@HorseLegend]

+IceMetalPunk no, it does, it needs to run with 64 gigabytes of DDR4 Ram, a quad core CPU and graphics that can render and de pixelate

[@IceMetalPunk]

Oscar Horsey I'm not sure what any of that has to do with quantum computing?

[@HorseLegend]

+IceMetalPunk quantum computer - 👎🏼

[@fjbayt]

The term "Ultra-violet Catastrophe" was first used by Paul Ehrenfest in 1911 talking about the Rayleigh Jeans law from 1905 and his attempts from 1903 to 1906 to solve the blackbody radiation problem using classical physics , Planck's work is from late 1900, but Planck was aware of a first try from Rayleigh from early that year (in 1900). So the catastrophe was solved before it was discovered... It was more like the desperation from those who couldnt accept the new quantum approach of physics. But i guess it wouldnt make a catchy soundbyte...

[@avyaanverma2779]

Tbh This was a relief lecture I now finally understand about ultraviolet catastrophe.Thank you Physics Girl

[@ZeugmaP]

For those who understand French and want to know more about the UV Catastrophe and Quantum mechanics, I recommend a channel named "e-penser"

[@youngbloodbear9662]

ZeugmaPowa cool ill check it out. J'ai etudié français pour 2 ans, mais c'est tres facile pour moi.

[@5erazoR]

Il y a mieux, il y a quelques vidéos de conférences/cours d’Étienne Klein qui sans rentrer dans les mathématiques explique les problématiques et donne un contexte historique intéressant.

[@clarkfeeley1959]

The real catastrophe was when some thought it a good idea to temp spray color your hair to appeal to 12 yr. olds.

[@IceMetalPunk]

"Someone" like her and "12 year olds" like her and my 26-year-old self, you mean?

[@clarkfeeley1959]

IceMetalPunk No, she is very intelligent and has a unique candor about herself. The message is most important, not the messenger. Content always, over frivolousness. She was talked into the hair color ploy, I guarantee.

[@Hier00]

She has the content. So should she wear a white sheet over her head (like a ghost) because anything else would be deemed frivolous? Let it go.

[@jetison333]

I really don't think youd be able to accurately guarantee that

[@michaelbauers8800]

Clearly not her reason. She did this to match the topic of the video - ultraviolet catastrophe. Not sure how this wasn't obvious, but now you know. It was whimsical, and fun

[@KevinVerstegen]

If I could get a cookie every time I was wrong... I would have black hair. -Quantum Physics

[@Seapatico]

This is the greatest thing. So excited about your videos!

[@XepheroiX]

@physicsgirl i just want to say your are a great inspiration to me im a senior in hs and im about to go to college for physics and i just want to say thank you so much for all you do

[@MusiCaninesTheMusicalDogs]

At 37°C, she's glowing hot! 😍

[@Kharnellius]

Not gonna lie...thought the same thing, lol. Love her enthusiasm! Go Physics Girl!

[@ObeyCamp]

Bangin' AND brilliant!

[@laxmandass6946]

That "what ever.. Physicists" had me laughing.

[@RolandWolf]

Love the hair! I fully support hair colors in the heigh frequencies.

[@Astrochronic]

oh please....smh

[@johnt.inscrutable1545]

Your channel is great. I enjoy the geekiness of your enthusiasm for science and sharing science. Thanks!

[@Phrenotopia]

Love the colour you dyed your hair with. I love violet and indigo. Also: This is was a very well done and interesting video! New stuff learned once again!

[@wesfin]

If you measure the electron and find where it is, then how do you know that it could have been anywhere, when you've measured its exact location? In other words how do you know there's a probability cloud anyway?

[@wesfin]

I'll probably just google it if no one responds lol

[@tzimmermann]

Look for Young's double slit experiment which showed the probabilistic nature of quantum mechanics.

[@IceeeTee]

The double slit experiment shows that one particle can interfere with itself. this is accomplished by being in two places at once (kinda). However if the electron is "observed" then the interference pattern disappears. See any of the many videos on the double slit experiment for more info :)

[@wesfin]

Thanks for the clarification

[@cliffharris6835]

I'd have to think that the double slit answer is more like a energy splatter that causes the interference.

[@canister0]

Man, I could watch her speak all day long

[@danielgeorgianni1687]

Dehydration is real my friend.

[@682tokorima2]

SIMP

[@deltablues24]

everybody in the comment section talking about the hair color.. guys she just talked about the foundation of quantum mechanics like seriously the hair color is more important than that? I am not saying that it is bad but you can just appreciate it without bringing it up and focus on the active topic..

[@falxonPSN]

Parallax and this is why reality TV exists. Due to Morons.

[@mikeraines7268]

As always, an awesome video. Please never stop making them and, I love the hair, 😍. I really enjoy your work and continue to tell as many people that i can to, at least, let their children watch something good for them.

[@tuckersossaman4485]

I'm not a mathematician but I can literally watch these videos all day and night.

[@999sian]

Lol i we just overd this in our A Level Physics Class

[@physicsgirl]

Isn't it nice when KZbin matches up with life? What did they teach in the class?

[@999sian]

The Photoelectic Effect. About Electrons being exted by electons or photons and emiting photons when the electons deexcited. useing the Equations E=hf and c=fλ. The teacher is pretty bad. it Nice having someone on youtube to explain it.

[@UltimateTobi]

I don't understand a word but, nice!

[@Allan_aka_RocKITEman]

_"Everything we call real is made of things that cannot be regarded as real."_ *-- Niels Bohr*

[@lyrimetacurl0]

But they're hyper-real 😆

[@TheConnor12500]

The gorgeous natural blonde hair is partially gone more importantly.

[@sub0fathom]

Hey haha her hair is just as gorgeous now.

[@rurutuM]

Joseph X its for the theme of this video

[@QuietMikeW]

Her hair makes her look like those insane sjw/feminists, which she can't be because she's smart and attractive.

[@sub0fathom]

***** Exactly haha she isn't so it shouldn't matter. Just because insane sjw/feminists tend to have that hair color shouldn't mean that they should be the ONLY ones that can have it. It doesn't look bad inherently.

[@JerehmiaBoaz]

+Mike Wilhelm If I were a woman and I'd have to put up with morons like you every day I'd be an insane sjw/feminist too. Grow up.

[@4n2earth22]

Superb presentation of an amazing topic. Understanding has been expanded. Contextual realization(s) of the quantum idea(s) that are currently favored are beginning to shed light {pun intended} on the true nature of nature. Bravo! More like this one, please.

[@patipineda627]

Physics Girl I love all your videos and use them in my middle school Physics classes. I hope my students come away feeling the excitement you express for science. I also want the girls to realize it is ok to be smart and "nerds" are cool!

[@LeandroLima81]

Love the energy and jokes :-)

[@MindLaboratory]

Learn something watching a fun, interesting video by an intelligent female. Then read comments, >50% about how she looks. Sigh.

[@diffusionskonstante]

thought so too...

[@marilynlucero9363]

What else did you expect? Welcome to youtube.

[@Edgard422]

Welcome to the world

[@marilynlucero9363]

Edgard Perez-Palma That too. Good one!

[@negritolindo8838]

jealous?

[@jedihorjus]

One could say that your hair is a... _Violet Catastrophe_. (it actually looks nice I just had to make that joke)

[@Ice.muffin]

The weird part is she said 'a violet catastophy' in the video LITERALLY a second after I read your comm, making it all clear. Damn weirdest synchronicity o.O.

[@ScienceByMike]

Now I wonder if she did that on purpose

[@d.e.b.b5788]

Perhaps the color is called violet catastrophe. Women's products often have weird names. Just look at all the make up names used for their colors.

[@zendoc49]

YOU are beauty and brains, I hope my grand daughters would be like you. Its so liberating to see a girl interested and love physics and not hair, nails, or food or religion. You are my new hero. PS you also explained the blackbody radiation better than a billion other sites !!

[@shiprasharma7479]

the position of electron that it can be anywhere until and unless we observe is called as super position you explain really good

[@John77Doe]

physics Girl, what did you do to your hair color? 😱

[@gazorpazorp9798]

John Doe would you say its a violet catastrophe?

[@mr.einhorn5666]

violett... hehe^^ violett hairs... hehe^^ katastrophe...

[@jonathanschossig1276]

Nerdymon *violet *catastrophe

[@mr.einhorn5666]

were're scientist not gramma nazis

[@WORLDMAGIC5555]

Scientists can write.

[@AlchemistOfNirnroot]

We're not writers. The closest thing to being a physicist is a mathematician.

[@WORLDMAGIC5555]

Actually not,the closest thing to being a physicist is a philosopher

[@Youezor]

Why half of the messages are about her hair?

[@Grubiantoll]

because they look great, And the color of the hair lines up with the story, in case soem wievers are too mesmerised with her appealing looks , color of her hair links them back to the story.

[@baruchben-david4196]

Why not?

[@zandemen]

I've only read about 50 messages and I've seen 3 about her hair, maybe the rest are in a quantum state so I didn't see them?

[@geraldfrost4710]

because it's a new look for the lady. smart ladies can look good too, ya know!

[@garielmartir9876]

I love you, Physics Girl! Nice video. I would love to see more of QMs.

[@stefaniasmanio5857]

Really great! Clear and funny as well. I'll show it to my students!

[@BlackEpyon]

So if you teach science class as a series of facts to be memorized, you're doing it wrong. Teach the method of science, and your students will always be self correcting.

[@geraldfrost4710]

I taught the trees in my yard what happens when they are wrong. It's amazing how inspirational fire can be! Now I have self-trimming trees.

[@MilanKarakas]

Fifty five hundred = 55100 :D Just a joke. I always say five thousands and five hundreds...

[@seancannon2193]

5,005 hundreds? so 500,500? At least that's one meaning that can take :P

[@MilanKarakas]

LOL

[@rich1051414]

When listening to an american, any time you hear ## hundred, just append two zeros. So Fifty Five Hundred = 5,500.

[@MilanKarakas]

I know. But still it sounds strange to me (I am from Croatia, and format of numbers are different).

[@seancannon2193]

Don't worry, we think it sounds odd too. I've always said it as five thousand five hundred. I've also regularly heard people who say it as 55 hundred say 55 thousand (not necessarily the same 55 at the beginning, but for example...) then get themselves confused trying to figure between what they said and what they thought lol.

[@jjptech]

your hair makes you look hot... no, really, it looks like a 11000k black body

[@jjptech]

so beautyful

[@datnguyenthe8300]

Jesus Palacios but she's white tho...

[@JustAChannel_13]

Hey now, she was gorgeous even without the purple. Search your feelings, you know it's true.

[@calebray8581]

Jesus Palacios I'd say even hotter... like 25000°k or more

[@Thwapwhacket]

11000k = 11,000,000. I'll assume you meant 11,000 K which is a measure of temperature and is roughly equivalent to that on the surface of our sun. (the coldest part of the sun)

[@dragonhawkeclouse2264]

i love how you said that, "the microscopic world just misbehaves" the very small often misbehave when no one is looking.......(a nod to the double slit test)

[@steve25782]

Your mentioning Rayleigh reminded me of the MIT folk song: Tell me why the stars do shine; Tell me why the ivy twines; Tell me why the sky's so blue; And I'll tell you just why I love you. Nuclear fusion makes the stars shine; Tropisms make the ivy twine; Rayleigh Scattering makes the sky so blue; And gonads and hormones are why I love you.

[@pdaphuulz8219]

somehow it's not until 5 minutes-in that i notice the hair color.

[@leomadero562]

i know ts such a violet catastrophe ;) sorry

[@manuelnagore4409]

Out.

[@rjsmith6698]

P DaPhuuLz .....don't feel bad, i didn't notice it at all, until i read your comment.

[@clown9480]

she dyed her hair violet to make a video on ultraviolet rays 😂👌

[@sylvibara004]

I never realized why until this...

[@mikeraines7268]

As always, great video. I've been hooked on your vids since the very first one I saw. Keep up the good work and I've got to say it, love the hair.

[@whatwouldhousedo5136]

This means absolutely nothing, but three weeks ago I treated Lord Rayleigh's grandson here in Vancouver. I'm studying to be a massage therapist and he was one of my patients; we got talking about medicine and science and he brought up that his grandfather had received a Nobel for discovering Argon and was also the one who explained why the sky is blue, among other things. That day when you feel insignificant...

[@edwardbullerwell672]

One of the best descriptions of the ultraviolet catastrophe I’ve seen.

[@dafneydewitt]

". . . only a nibble of the cookie of quantum weirdness," matched with a video clip of biting into a cookie. It's this kind of weirdness that makes Physics Girl worth watching. She makes physics fun.

[@jaypastrana416]

This video elaboeates for the whole spectrum of the universe, and it is impresive.. And perhaps this explains the spectrum you're emanating Ms. Cowern, you're extatic for science,as do we all.. Keep up the great job of explaining science.

[@travis_approved]

So KZbin recommended me a 40 minute video about this topic and I was curious because the ‘ultraviolet catastrophe’ is such an interesting name but it was way over my head. This was in the recommendations and I was like “ah I know her I’ll watch that one instead” 😂 much more entertaining and easy to understand than the other vid so thanks 🙏

[@AnelorGalor]

Nicely done and so positive. I bookmarked that right away in my motivational folder!

[@baslifico]

Stumbled across this by chance. Really miss you. Best wishes for your recovery

[@MetalTalk666]

I love your hair here. I’m an electrician in Tx, and I find your videos very interesting. Don’t stop making them. Thanks.

[@anandshinde9941]

Love your videos Physics Girl. I always show your video to my daughter. I hope someday she will develop interest in Physics like you.

[@Szobiz]

OMG OMG OMG I LOVED YOUR CHANNEL THE MOMENT I SAW A VIDEO! AWESOME WORK!

[@BuckRogers2000]

The purple hair is an AWESOME touch!!

[@awkward-stranger]

You are so helpful, you really have a talent for explaining so all can understand. Thank you

[@lavanyabhatnagar7412]

Glad I searched this out of the syllabus topic! At least I stumbled upon such a great YT channel