This is one of those those great but largely undiscovered nuggets that not only explains the subject of blackbody radiation in detail but also, importantly, the historical context of the research, the questions being asked about the relation between frequency and temperature, and the steps that led to a solution.
@douglasstrother65842 ай бұрын
Planck's approach was to analyze the entropy of blackbody radiation as a function of energy. To make both high-frequency and low-frequency data consistent with the Second Law of Thermodynamics, he included an additional "guess" term proportional to the frequency. Planck's application of Boltzmann's Statistical Mechanics led to his conclusion that the material of the walls emit and absorb radiation in discrete quanta. A paper titled "Planck’s Route to the Black Body Radiation Formula and Quantization" by Michael Fowler (7/25/08) gives a nice discussion.
@johnhowell11522 жыл бұрын
Well done! The historical overview combined with the basic mathematics is spot on. I will show this to my class tomorrow.
@gogonogo20693 жыл бұрын
Omg!! I was so shocked to see this only got a few views! I'm definitely going to watch more of this though! I hope your channel grows really well :)
@arnavkaul78278 ай бұрын
This is honestly one of the best explanations ive ever heard
@mattchuckran9077 Жыл бұрын
I've been trying to comprehend blackbody radiation for a few now and this is the first video that got it to click. Thanks!
@carlossierra96858 ай бұрын
dude, this made me understand the concept so well, I was so lost in my college class
@raymontedmond38672 жыл бұрын
Teachers like him makes physics very interestinng 😊
@cowgomoo444 Жыл бұрын
Fantastic work. You're a natural born teacher. Thanks for this.
@selin4393 Жыл бұрын
thank you so much you made things so much simpler for me
@davidm32103 жыл бұрын
I'm still in the weeds, but that presentation got me much closer -kudos to you, sir!
@xainabshuja42152 жыл бұрын
Thank you so much for including the history as well, I rarely find such high level lectures incorporating information in an interesting narrative! Subscribed!
@user-yd5el7pg1f Жыл бұрын
My 2 hour lecture in 10mins thanks sir 😁
@ashafaghi11 ай бұрын
Excellent video on the subject 🍻
@RubzieMaui2 жыл бұрын
The best video I've encountered about this topic, I understood the topic more. Thanks
@nijataliyev14703 жыл бұрын
excelent, you show the problem and how scientists asked questions to come up with the current solutions. well done.
@henryguo81652 жыл бұрын
I am already in quantum physics and this is best physics teacher on KZbin
@proudirani3 жыл бұрын
Excellent explanations. The demos helped a lot too. Thank you!
@josephshaff5194 Жыл бұрын
BAM! Thank You! I couldn't comprehend get how Plank decided to use Energy as discrete units ! omg! I've been wondering that for yrs. yrs!
@DeepakRohra10 ай бұрын
Man bless you for creating this .. I finally grasped this concept
@fractalnomics3 жыл бұрын
You explained this the best I've seen.
@woodwind633 жыл бұрын
Extremely well done! Nice presentation. Thank you.
@xX_joemama69_Xx2 жыл бұрын
Yo homie is absolutely goated.
@theboldenough9 ай бұрын
This man> my college staff with phd's
@dnishal3 ай бұрын
Good video, very enjoyable to watch and informative ❤💪
@anzatzi Жыл бұрын
Great video--added significantly to the discussion!
@josephshaff5194 Жыл бұрын
Such a critical piece of the puzzle! Great job! 😀
@nathanielnatejacobs46192 жыл бұрын
Thanks A lot Man! I really love this content and Now Imma satisfied. 😀
@albertico17752 жыл бұрын
What a great video, keep it up!!!!!!
@lunasun8722 жыл бұрын
Thank you! Very interesting and educating video.
@amysantiago54202 жыл бұрын
This is great actually great
@penumalasunitha142 жыл бұрын
Outstanding explanation sir,u really explained in such a great way that made this most confused topic very interesting and very easy .I am ever grateful to you.thankyou so much sir,for explaining this topic in a clear and best way .keep doing more videos like this ,it will be very very helpful to us.All the best sir,u should reach heights❤
@krave37462 жыл бұрын
Thank you sir you r very underrated
@user-jm9wh3il1b9 ай бұрын
This is amazing ! Thanks alot
@iaza23912 жыл бұрын
Wow really helped supplement both my professors lecture and even my reading of my textbook! Thank You!!
@jaykishan1328 Жыл бұрын
Thanks. Love from India
@vLogPhase2 жыл бұрын
Thankyou Sir I found it more like a interesting conversation .🙂
@piyushdaigavhane34882 жыл бұрын
Dude, you just made a boring science lecture, very interesting, Thanks
@danielmansa6276 Жыл бұрын
Wow Well explained
@nicholascornwall68533 жыл бұрын
Love the graphics (are you drawing everything backwards?) Really good simple explanation and use of equations Brilliant more please
@harshevardhan96013 жыл бұрын
Probably not. He can just invert the digital screen he is writing on.
@PhysicsOMG3 жыл бұрын
Thanks, yea I write on a clear sheet of plexiglas and just flip the image with a video editor
@valstewart70802 жыл бұрын
This is amazing! Thank you for the great explanation!
@viliampichler57882 жыл бұрын
Brilliant presentation!
@saarausmaan3 жыл бұрын
Wow great job... keep it up
@achinthasewnina99402 жыл бұрын
Thank you!
@amandaferrera67712 жыл бұрын
Brilliant teacher. U made my day!
@artianrika8329 Жыл бұрын
very helpful thanks😃
@tspandya Жыл бұрын
Very nice insight! Thanks.
@sergiovelazquez12592 жыл бұрын
Loved this video, thank you for the explanation
@angelisvegan58263 жыл бұрын
Sooooo underated!!!
@user-bv1oy6dy8q2 жыл бұрын
Amazing
@pdfgovardhanb8093 Жыл бұрын
Nice
@solapowsj253 жыл бұрын
Planck constant is energy in one photon. Multiply this by number of photons per second and you get the energy of a radiation based on frequency or color of the radiation.
@arvind7820 Жыл бұрын
Unbelievable. How you explain this concept so easily??? It's great. Today I gain more knowledge of this topic. Thanks a lot. 🙏
@user-ow5wg3en1q Жыл бұрын
Thanks
@GameBOY692 жыл бұрын
Nice actually...
@salamalmudarris5032 Жыл бұрын
So Boltzmann was the creator of the idea of energy quantization!
@dimit732 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? Why most of the emitted energy is located at a small area of the spectrum?
@judahrosner86638 ай бұрын
Very clear explanation. But why are the curves shown smooth? Is it that there are so many frequencies thaat they appear smooth but if we had better definition we would see little spaces between the points?
@PhysicsOMG6 ай бұрын
yea that's exactly it, we just use a smooth curve to represent it since there's so many different possibilities for frequency (a lot, but not infinite). If you zoomed in on the x-axis you would see discrete quantities
@angrydaniel2905 Жыл бұрын
So I understanding that the energy comes in packets. But why does that make the curve go back down eventually? I don’t understand that yet
@kansuerdem2799 Жыл бұрын
Dear Professor, Max Planck constant is the smallest unit in nature. how can it be that h/2pi is even be smaller?
@PhysicsOMG Жыл бұрын
the Planck length is the smallest possible size of something, but h/2pi is the uncertainty in a measurement
@kansuerdem2799 Жыл бұрын
@@PhysicsOMG Thank you so much. Your answer is very interesting my dear professor. someone else said the following? Planck's constant is, indeed, the smallest constant used in physics, which is reflective of the quantum scale. However, it is just a scale and not a physical quantity. Hope that clarifies it. please could you give your opinion on this ?
@monicakc52142 жыл бұрын
Love frm India
@Uncreeperble9 ай бұрын
Please tell me how you do the whiteboard thing its the exact setuo as Joel Speranza and hes keeping the secret safe. My final physics exam for 50% is tomorrow morning but this is the most important thing right now.
@PhysicsOMG9 ай бұрын
lol it's pretty easy, I set up a camera in front of me, I sit behind the board and write. In the original video, all the writing looks backwards but when you mirror the image it comes out right. You can tell because I'm right handed but it looks like I'm writing with my left hand in the videos
@Uncreeperble9 ай бұрын
@@PhysicsOMG thank you i thought this was the case. Physics was easiest exam ever although I forgot a few formulas and wrote wrong ones down lol it happens
@irwanahmed0013 жыл бұрын
hey that was a very nice video. Im a high school physics student and some questions I have are: -why do the intensities of wavelengths lower than the peak value decrease so quickly as compared to the curve for the wavelengths higher than the peak value? -does the black body radiation curve mean that it cannot be applied to objects that are not good absorbers of radiation, e.g. plastic? Thank you if you answer these questions
@PhysicsOMG3 жыл бұрын
Thank you, I'm glad it helped! For your first question, remember that the smaller wavelengths (which drop off quickly) correspond to higher energy photons. If you have an object at a certain temperature, there is only so much energy that can be radiated (no UV catastrophe). So there can't be very many of these high energy photons because statistically it is more likely for the low energy ones to be given off. That's why the low energy end of the spectrum gradually trails off but the high energy one drops off quickly - the probability of high energy photons becomes basically 0 beyond that peak. There is a really good minutephysics video that explains why its mostly lower energy photons that get emitted: kzbin.info/www/bejne/n2K3h41_d89qi6M For the second question: in real life the only things we see that actually behave like true blackbodies are ones we make (like the example of an oven with a hole punched in it), or stars. Everything else will sort of follow that curve but will only have a fraction of the ideal emission seen in a blackbody curve. So yes, something that is a poor emitter will not have an emission curve that looks like a perfect blackbody curve.
@irwanahmed0013 жыл бұрын
@@PhysicsOMG thanks a lot
@PrinceKPrasad3 жыл бұрын
👍
@richardbarstow38612 жыл бұрын
Is anyone going to talk about how this man drew a graph and wrote letters backwards??
@simongross31222 жыл бұрын
Thanks for the video. I am trying hard to understand this topic. To me, E=nhf just means that energy is a function of frequency and does not imply discreteness since presumably f can vary. Or is the point that for a *given frequency* energy can only be positive integer multiples of hf? How is frequency allowed to vary? Is frequency also quantised somehow?
@PhysicsOMG2 жыл бұрын
Frequency is continuous and can be any value you want. But for a given frequency, the light is actually emitted in little chunks that are a multiple of Planck's constant instead of one big wave. It's not the value of the energy itself, but the wave packets that carry away the energy that are quantized.
@simongross31222 жыл бұрын
@@PhysicsOMG Thank you for that clarification. I really like your explanations. I am still a bit confused though. If energy is quantised, then it stands to reason that the energy that you put into your black box to heat it up is also quantised. And therefore only certain frequencies will ever be input or emitted. Where does the continuous spectrum of frequency come from? There's something missing from this picture, at least to me :)
@Marcus-hn2gq11 ай бұрын
I think it should be the intensity (I) = sigma T^(4) cuz I=P/A 😅
@sipkagergo23532 жыл бұрын
James Jean was not french, he was English, I don't think he pronounced his name like that :D
@PhysicsOMG2 жыл бұрын
lol I know, one of my professors in college pronounced it that way so that's how I learned it. Old habits die hard.
@DaRealBubblesRBubbly2 жыл бұрын
wouldnt the peak wavelength be inversely proportional to the temperature in wiens diplacemnt?
@PhysicsOMG2 жыл бұрын
yep, thats right
@youngsoung658 Жыл бұрын
虽然没听懂但是谢谢🥺
@amansoni54852 жыл бұрын
in 03:59 he says maximum or the peak wave lenght but if the wavelenght is plotted along x axis shouldn't the peak wavelenght be at infinity (according to the graph)? or should it be peak intensity ?
@PhysicsOMG2 жыл бұрын
By peak wavelength we mean the wavelength that corresponds to the peak in the graph. That shows us the most common wavelength of photon that is emitted by the blackbody.
@amansoni54852 жыл бұрын
@@PhysicsOMG thank you
@FAIRBOY113 жыл бұрын
Great video, thanks, but how exactly proposing energy is quantized is fixing the curve in high frequency region?
@PhysicsOMG3 жыл бұрын
allowing energy to come in discrete amounts instead of any value made the mathematical model match the curve that was seen in experiments
@danielpursey84712 жыл бұрын
@@PhysicsOMG The bit I struggle with is (as Fairboy says) - h fixes the curve, but why? I wish someone could explain what is happening as we move along the curve, why does it come back down?
@harshevardhan96013 жыл бұрын
5:38 won't it be because the black body will end up giving all its energy as radiation and have infinite heat capacity?
@PhysicsOMG3 жыл бұрын
yea, basically if that model was correct then the object would emit infinite energy at smaller wavelengths and do all sorts of other insane stuff they knew must be wrong
@solapowsj253 жыл бұрын
Maybe infinite in this riddle makes the black⚫ night sky☁ turn blue in the daytime. If not, then it's something to imagine a dazzling sun ☀️ against a black⚫ background of the night 🌃sky which would behave like the black body. Power of infinity.
@ZuperZucker Жыл бұрын
how do you write backwards that well?
@anzatzi2 ай бұрын
"peak wavelength"? do you mean wavelength at peak intensity?
@PhysicsOMG2 ай бұрын
yes
@voidisyinyangvoidisyinyang8852 жыл бұрын
I think "Jeans" is pronounced in English and not French? He was an English physicist I thought? James Jeans is his full name. thanks
@jsh5297 Жыл бұрын
SHREKK !!
@courage9362 жыл бұрын
Is it pronounced as plahnk or plunk?
@PhysicsOMG2 жыл бұрын
I'm not German so I'm no authority on it but I think it's plahnk. I just say it the same way my physics teacher always said it when I was in high school.
@courage9362 жыл бұрын
@@PhysicsOMG thanks for the reply : )
@Sonu-ps4lm2 жыл бұрын
Sir your looking so handsome and your teaching is very welll aalso