Quantization of Energy Part 1: Blackbody Radiation and the Ultraviolet Catastrophe

Рет қаралды 946,407

7 жыл бұрын

So we know that physics got turned upside down at the turn of the 20th century, but how did that all begin? What was the first thing that set this whole chain of events into motion? Well it all started with Max Planck, blackbody radiation, and the ultraviolet catastrophe. Gather round, children. Let me tell you a tale...
Watch the whole Modern Physics playlist: bit.ly/ProfDavePhysics2
Classical Physics Tutorials: bit.ly/ProfDavePhysics1
Mathematics Tutorials: bit.ly/ProfDaveMaths
General Chemistry Tutorials: bit.ly/ProfDaveGenChem
Organic Chemistry Tutorials: bit.ly/ProfDaveOrgChem
Biochemistry Tutorials: bit.ly/ProfDaveBiochem
Biology Tutorials: bit.ly/ProfDaveBio
EMAIL► ProfessorDaveExplains@gmail.com
PATREON► / professordaveexplains
Check out "Is This Wi-Fi Organic?", my book on disarming pseudoscience!
Amazon: amzn.to/2HtNpVH
Bookshop: bit.ly/39cKADM
Barnes and Noble: bit.ly/3pUjmrn
Book Depository: bit.ly/3aOVDlT

Пікірлер: 565

@kristinemazziotti6455 3 жыл бұрын

Your intro alone just made me so happy.

@ethanjogola2718 2 жыл бұрын

I always replay it ~3 times before actually getting to business

@elyria9788 2 жыл бұрын

I felt like it was really dorky and a little cringey the first time. But he is sooo good at breaking down complex concepts in the least amount of time. He doesn't bs and wind on for 30 minutes... Unlike some people I personally am. Anyway after a while the song grows on you, it is cute dorky now.

@santoshjung8443 Жыл бұрын

😘

@markrhoadesjr2099 Жыл бұрын

Me too!

@RDX-bs7nx Жыл бұрын

Hii from India 🇮🇳

@Ahmed-hd4lr 2 жыл бұрын

i’ve always been mesmerized by scientists discovering such a revolutionary thing as Planck did. as it said in the video he didn’t believe his own discovery but imagine how incredible it’d feel to literally discover how one of the fundamental things about the universe

@thomasbruinsma Жыл бұрын

I don't think it felt incredible for Planck, as he couldn't even believe his theory himself!

@marvindomil5116 Жыл бұрын

yo u have the same profile picture as me lol

@isaacchrisman7528 4 жыл бұрын

Professor dave i have had two professors explain this to me and your explanation was the only one that actually made it into my head. Thank you!

@pinkgeo691 3 жыл бұрын

Same

@alieubah3317 3 ай бұрын

SAME@@pinkgeo691

@sphanie 4 жыл бұрын

this is weird but why do i get so happy when i finally understand a physics concept?? this is only part 1 and i already feel like i can answer my exams hahhaha

@llll-lk2mm 3 жыл бұрын

Dude same, I am 2 days away from an exam and Dave Grohl is saving the day

@clipit4503 3 жыл бұрын

@@llll-lk2mm did you do well bro?

@mydean_irl 3 жыл бұрын

OH MY GOD SAME I WAS SO BLUR IN CLASSS BUT HIS CHANNEL HELPED ME TO UNDERSTAND WITHIN FEW MINUTES

@debanjali 7 жыл бұрын

Dave Ghrol made me pass all my topics in physics! THANK YOU SO MUCH!

@edgelordofmordor 6 жыл бұрын

Miss Jackson yeah he ain't like the others....... he's a class apart

@llll-lk2mm 3 жыл бұрын

I expected him to break into Everlong any second

@jayvin4733 3 жыл бұрын

The Dave Ghrol of science

@phenomelon 6 жыл бұрын

Jolly good, this is. I am taking a course in modern physics starting two weeks from now. I knew you would have something for me and boy am I excited for this youtube series and this course after watching this video.

@leonard1871 3 жыл бұрын

Your description on the quantization of energy is nigh unparalleled, even a kid could fully grasp it from this, so much sense hit me on the topic after watching this.. things I had initially took for granted and never really understood on quantization make so much sense now , its almost crazy , the whole thing on the miniscule scale/nature of quantization being the reason why it was overlooked in the classical approach of black body radiation calculation is crazy, thanks Professor Dave...

@brian_mcnulty 7 жыл бұрын

That shit you just said about the quantization being multiples of such a small number just blew my whole world apart.

@Reaction1s 3 жыл бұрын

Soo Much red? If there is drag, even on a single referenced plane, wouldn't there be wash?

@Reaction1s 3 жыл бұрын

It's a double drag that 4 happens anyway; In what set is 1 fuzzy? 3 at least has a unity and a fuzzy...

@rinnegansr5980 4 жыл бұрын

your pace of explaining anything is perfect.

@amanmujawar8989 2 жыл бұрын

JOTARO!!!!

@HaifaaAmni 2 жыл бұрын

@@amanmujawar8989 DIOOO!!!

@Primitarian 2 жыл бұрын

I have never ever come upon an explanation of the Ultraviolet catastrophe, and thereby Planck's equation, as clear and concise as this one.

@alexshanto7285 2 жыл бұрын

I watched many videos and thought for hours. But I couldn't completely understand the concept that you make clear in 2:10 -2:30 seconds. Thank you so much. You are awesome.

@sharminabadi6798 3 жыл бұрын

i love you so much for making this playlist😭

@Kni90270 5 жыл бұрын

Why I did not find you in the past 29 years of my life. Awesome !

@AravinPrincePeriyasamy 6 жыл бұрын

One of the best video about BBR. Thanks a lot Dr Dave

@samanthadaniels509 6 жыл бұрын

I am currently in the last leg of my schooling to become an x-ray tech; these videos have helped me understand the more drawn out parts of radiation physics than any book that I have paid hundreds of dollars for. thank you so much!! and please keep making these videos

@khawandbux 2 жыл бұрын

Sir Dave your lectures are quite helpful at FSc level and MDCAT preparation...

@backstrapped Ай бұрын

This is the best explanation of quantisation i’ve ever seen.

@mg_phopla 3 жыл бұрын

Your videos are great. It feels like I am listening to a story. I love it!

@douglasstrother6584 21 күн бұрын

Planck's approach was to analyze the entropy of blackbody radiation as a function of energy. To make both Wein's Law and Rayleigh-Jeans Law consistent with the Second Law of Thermodynamics, he included an additional "guess" term proportional to the frequency. A paper titled "Planck’s Route to the Black Body Radiation Formula and Quantization" by Michael Fowler (7/25/08) gives a nice discussion.

@albirtarsha5370 10 ай бұрын

I am so happy that I could share this with my son! Thanks Professor Dave!!!

@Anand_dairy 3 жыл бұрын

You r the best your channel deserves more than 10 million thanks for the explanation

@dylantrost4471 10 ай бұрын

Great video. I feel like I’ve been slightly in the dark on black bodies my whole life. Something didn’t quite click. Now it does. You’ve explained it brilliantly.

@asldfkhjaslk 3 жыл бұрын

Really amazing work. Wish I had professors like you in my college

@SingingPostman27 10 ай бұрын

Thank you, Prof. Dave. this brought back memories of what I've learned in College. I have a book, by Frank Tipler, on the Physics of Immortality.

@ffwingman329 Жыл бұрын

Thanks professor, you have no idea how much I appreciate your explanation

@ishitasangwan6687 3 жыл бұрын

this video is great and is like a story of origin of topics i stuided so far and this video is just great

@CarinaPrimaBallerina 2 жыл бұрын

This was so interesting and inspiring. Thank you!

@sagarak999 6 жыл бұрын

That was actually very helpful! Thanks!

@nagmsrao 4 жыл бұрын

prof Dave Excellent explanation..thank you for your videos...😊

@chaosend3815 4 жыл бұрын

Thanks a lot Professor Dave! My book speaks in chinese to me but now I understand the idea

@Wetubedd 5 жыл бұрын

Great explanations, thanks!

@morezco 3 жыл бұрын

Why yes I will sub to the channel. What a life saver!

@methree3821 2 жыл бұрын

Fantastic! You teleported me back almost 20 plus years back to college days! 👽

@lancelovecraft5913 7 жыл бұрын

If I start a shoegaze band one of the album's will be named Ultraviolet Catastrophe

@NiflheimMists 4 жыл бұрын

Would the chords be quantized on such an incredibly small scale that the gradations between the notes are utterly minuscule, so as to appear as one continuous spectrum?

@llll-lk2mm 3 жыл бұрын

@@NiflheimMists yes, and a finite duration of constantly increasing frequency starting at different times relative to the start will be looped too.

@Darfaultner 3 жыл бұрын

Sounds like a grindcore song

@vitoriatonini 4 жыл бұрын

Awesome, thank you Dave!

@emracho79 4 жыл бұрын

thank you for videos. very helpful for us to understand more

@thedisintegrador 7 жыл бұрын

Awesome, as always

@kerrickakinola7398 7 жыл бұрын

Great video and explanation.

@aurora.3697 3 жыл бұрын

Your channel is the best, thank you!

@SageLewis 4 жыл бұрын

I think this is the best video to help me understand the ultraviolet catastrophe.

@samuelwamwere4867 Жыл бұрын

Thanks Dave. I needed this!

@andrewpalucci9465 3 жыл бұрын

This actually really helped after being completely lost in class. Thanks alot!!!

@matthewstecy2509 6 жыл бұрын

Great video, thank you!

@wonderpookie 3 жыл бұрын

What a great video. Thanks brother!

@sanjanagupta3441 9 ай бұрын

Thank you Professor David❤ Watching your videos in India❤️

@prakasamkannadi7616 4 жыл бұрын

Simple,better than many videos.

@19manjeets2 5 жыл бұрын

Thank you this helped me so much.

@perpl3xity 6 жыл бұрын

This is the clearest and most thorough explanation of this concept I have heard yet. Thank you for your work.

@bigboss-tl2xr 6 ай бұрын

Ahhh... The wonderful catastrophe just got you a new subscriber!

@BADGAYAN 5 жыл бұрын

I am his follower. I tell you he is truly awesome I don't know where he teaches in the US.

@thechnet 2 жыл бұрын

very understandable explanation, thanks

@pateralus9 5 жыл бұрын

It's absolutely incredible that an ad hoc utilization of Planck's expression for black body radiation turned out to be so amazingly useful. It's hard to believe sometimes that hypotheses can become such hard & fast truths about spacetime. Wow. And sometimes it feels like it comes from simple laziness: "I just want to deal with integers right now; it's easier. Oh, that reveals fundamental truths about the nature of reality? That's cool, I guess. 😎" -Max Planck, probably

@theodoresepeesa7636 Жыл бұрын

I'm a biology student and you explain some of these concepts better than a number of my lecturers. Thanks you're helpingme out a lot🤘

@excitting9941 2 жыл бұрын

Thank you I am talking a physics exam and this video helped a lot 👍

@athulcarun 29 күн бұрын

thank you for that awesome explanation

@ProfessorWaltherKotz 7 жыл бұрын

It's structure and content - not a thing to complain about!

@anthonyyee7481 6 жыл бұрын

Hi Prof. Regarding the UV Catastrophe ...I can understand the math, but intuitively, what is stopping me from putting more energy into the system and thus raising it's frequency such that it moves BEYOND the UV region and emit X-Rays and Gamma rays? In that vien, how are Gamma Rays produced? TQ

@itsReallyLou 4 жыл бұрын

Very well done!

@kunalsatwik9962 6 жыл бұрын

sir your teaching way is awesome. Sir I request you to post some videos on optics. thankyou

@iZuhaibAkhtar Жыл бұрын

You are Incredible. Thank you so much.

@33859seveerr 4 жыл бұрын

Thank you. Very well done. Now I know ! !

@sonurana766 6 жыл бұрын

Very good video. मजा आ गया बहुत सीखने को मिला

@lorrainewaters6189 3 жыл бұрын

Excellent, thank you.

@richardgonzalez9773 Жыл бұрын

It's because of youtube and videos like this, I think the future of teaching is delivered with such videos with teachers being supplementary tutors and practical engagers

@3v3pirat37 Жыл бұрын

Far better than watching them derive equations, work no examples, skip steps, give history lessons, the list goes on and on. The history is very important but not at the expense of class time on such difficult topics. We can learn all that later on our own time if interested.

@BADGAYAN 5 жыл бұрын

Prof Dave is marvelous

@dernervigetypausdernachbar2307 Жыл бұрын

my exam is in a few days. This man is a hero.

@namraaah271 2 жыл бұрын

I feel smart now so I actually feel like crying 😭 thank u professor dave

@nournawar1762 3 жыл бұрын

Sir, I have found similar videos on KZfaq discussing the same topic but no one of them said that the equation for black-body radiation had a constant n which can be only an integer which preserves the quantization principle, all the equation just mentioned Plank's constant and the frequency.

@xainabshuja4215 2 жыл бұрын

n is basically the number of photon packets so think of it as (no. packets)(Planck's constant)(frequency of radiation)

@mahmoudahmedramadan1651 2 жыл бұрын

Hey chemistry nerd, I found you !

@nournawar1762 2 жыл бұрын

@@xainabshuja4215 this does not seem to be the case here. n is simply an integer value that keeps E from having a continuous value.

@antiksur8883 Жыл бұрын

@@nournawar1762 the n is the number of photons, which has to be an integer.

@sammy5576 6 жыл бұрын

thanks that was awesome i'm gonna like and subscribe

@anakhabinni1557 4 жыл бұрын

Thankfully. Nice class

@Hosni10 2 жыл бұрын

That was so good Thanks professor And you know something guy’s I study this in the last year of the high school In Iraq and I see most of you studying this in the college 💪🏻❤️

@anicondri Жыл бұрын

I know this is a pretty old video, but thank you! I struggle when listening to lectures, but you explained it in a simple yet thorough way that helped me understand. Your videos really make me enjoy learning, so thank you!

@pietgodaard4610 4 жыл бұрын

Very nice video. Thanks

@johnpruyn7335 5 жыл бұрын

Great explanation

@enverismail6864 4 жыл бұрын

that makes sense... if you look it everything is just a vibration of sort the reason its quantised is because the separation between level is just the "dead space where force cancel" before it start its unbalance again

@Chelsea-fn3zj 6 жыл бұрын

really helpful thank you!

@Videohead-eq5cy 5 жыл бұрын

I heard somewhere that Planck just got irritated with the math and introduced h as the minimum energy value, fully certain that h=0, so that classical mechanics would still work and minimum energy would still be 0. But later in the calculation he saw that h has an actual value, and not just 0

@AKM______007 4 жыл бұрын

How would classical mechanics work by taking h=0?

@Sakshi-vj5km 4 жыл бұрын

this guy looks like ranbir kapoor

@rahmatnawisiregar6263 4 жыл бұрын

That my freind is called planck postulate. Planck him said "I tried all the thermodynamic things, but it cant answer the question. This postulate works, but indong know why"

@ladymercy5275 4 жыл бұрын

@@AKM______007 Limit approach, as h -> 0.

@AKM______007 4 жыл бұрын

@@ladymercy5275 thanx 🤘

@93varad 6 жыл бұрын

Well explained.

@Chris-fe1kx 5 жыл бұрын

Thank you professor! :)

@MissionTrueLove 2 жыл бұрын

Thank you for this video

@davewilson13 6 жыл бұрын

Hmm I’m Dr Dave and I teach physics, I am glad to see this channel.

@rokayasamy3009 4 жыл бұрын

That was really helpful thanx

@KunalKumar-ow1vq 2 жыл бұрын

Thank you for your video 👍

@noxnc 6 жыл бұрын

Nice explanation. I am a physics lay person. I have never heard that explanation of Planck’s constant before, it suddenly seems to me to have fundamental importance.

@yoalisaac7363 7 жыл бұрын

Great Job Professor Dave, That's so helpful.Thank you for such an amazing Videos.

@perriannesimkhovitch1127 Жыл бұрын

If you wanted to communicate with Plank's conjoined operatives would you use intergers or the fractional irrational numerical sets that upset the constant?

@ocayaro 2 жыл бұрын

The ad hoc approach is baffling. That’s the spark that defines genius.

@davisclute7705 2 жыл бұрын

Great video!!!!!

@potawatomi100 3 жыл бұрын

Love your videos. Your explanations are easy to follow. Thank you

@dimit73 Жыл бұрын

very nice video. How the Planck ypothesis explains the Ultraviolet Catastrophe ? I mean why the fact that emitted radiation has energy E= nhf, leads us to predict the actual distribution of the black body radiation at all wavelengths?

@sunahangrai3601 Жыл бұрын

i get the concept of anything from this video series and move on forward underanding by wandering everywhere

@81shahidshamalik48 6 жыл бұрын

Hey 👋 easy was I am undustanging concepts #thankuu Dave

@fozia2006 5 жыл бұрын

Awesome 👍 explained

@SujanDahal 3 жыл бұрын

Thank you professor David. You easily explained answer of 2075 Bsc Physics Tribhuwan University #Nepal Question number 7(b) which wasn't mentioned in any book and guide. ❤️💙 Always Fan😊

@prajwalshrestha4210 3 ай бұрын

what was the question?

@adhamkhaledmohamed3989 3 жыл бұрын

Man, you are legend!!

@salahmalik5593 7 жыл бұрын

thanks alot ! keep up the good work

@daniel_frick 5 жыл бұрын

"catastrophe" comes from the Greek and means, literally, nothing more than "turning downwards", not a "dramatic turn of events". "ultraviolet catastrophe" describes the dipping down in the uv spectrum.

@eeronat 3 жыл бұрын

Wow, that makes a lot more sense! Thank you.

@saurabhkumarsingh6988 3 жыл бұрын

Thanks

@enzoqueijao 3 жыл бұрын

But a room full of scientists in panic because of ultraviolet radiation is also a very nice image

@debastiancebs 3 жыл бұрын

@@enzoqueijao that's exactly how I always imagined it

@jansimon1469 3 жыл бұрын

The claim at 00:55 is highly disputed. The eye doesn't care about Watts, it "sees" photons. But the peak of the planck wave for photon rate (at 5778 K) is in the IR-region. This only applies for a linear wavelength scale. If you use a linear frequency scale, the peak positions change again.