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.
Consider the following: "IF" temperature dictates whether a star is red or blue shifted, then how could 'red shift observations of stars' ONLY be concluded as 'space' itself is expanding? And what exactly is 'space' that it can expand?
A star emits a range of wavelengths in its spectrum but it peaks at one particular wavelength. So a star might appear more yellow if the peak intensity is in the yellow visible light region.
@@satishmhatre2943 yep, you're right. It peaks around the green region, so it emits the most green light. But if you watch the end of the video, it explains how our eyes favour certain colours. And another factor that comes into play is the earth's atmosphere/climate. The amount of scattering differs depending on the wavelength. The atmosphere tends to scatter blue light more. So... White light (combination of all visible lights) minus blue light gives predominantly yellow.
Thank you very much for this beautiful and clear explanation.. I kindly want to ask about that mathematical process, when I calculate it i found the result as 4.99 x 10^-7
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.
Mam but if colours shifts towards left when temperature is increased . Then why is the rod appearing red when heated , it must be appearing in some other colour like blue or indigo because of high temps ?
You're completely correct. When the rod is heated to a higher temperature, it will appear more blue. There's also the saying that something glows white-hot when it radiates the entire visible light spectrum.
@@vt.physics but mam if an iron rod is heated to high temperatures and turns white in colour, why does such a big radiating structure like the appear to be green in colour? Is there any other factor affecting the max wavelength apart from temperature?
@@redsalt69 peak wavelength isn't quite the same thing as the color we see. What we see is a combination of the wavelengths of light being emitted (or reflected) by an object AND how our human eyes work. The "cones" in our eyes are not sensitive to all wavelengths of light, so something putting out a lot of light in a wavelength we can't see may not appear to glow at all (for example, infrared or ultraviolet).
great info... except the bit about flame colors at the beginning - that's just photo-emission in the plasma of the flame. Natural gas burns below 1700K and that is nowhere near the temperature needed to peak in the blue end of the blackbody spectrum.
I like your videos but cant get past the 10 second mark because of the horrible background noise. Can you please tell me if you have made any videos where your annoying noisey neighbour is not playing his music while you are talking?
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.
Great explanation and the animation was so cool!!!!
P.s. the green light sun concept kinda blowed me off!! Thank you so much for this amazing video!
thank god our eyes can't see the sun green
the sky would look depressing as fuck
OMG you are so underrated!! Thank you sm❤ this was really helpful
Can anyone explain this any better?? Definitely not! It was perfectly explained. Thank You :)
I can explain it way better
S
Really beautiful explanation!!!! Thanks to you I'm a little more confident for my exam.
good luck on your exam!
Simple and crystal Clear.. cheers
This was literally the best explanation! Thankyou so much!
Thank yoooooouuuuuuu I finally understood it!! Well explained 💗
🔥🔥🔥
It was awesome broo......keep it up❤️
🔥🔥🔥
Bro😂🤦
Absolutely Brilliant ✨
thank you!
This video helped me so much! sending this to my classmates.
best explanation out of all and in th shoertest time !! Good work
Excellent explanation
dammmnnn youre underappreciated
amazing!
Cool explaination 👍
Finally, I got it😌
Thanks for this! However, I was wondering about how exactly Wien's constant came to be. Is there any video you could possibly recommend me on?
Helped a lot, thank you so much!
Very excellent explained 😃
Lit! Fire! Dank! 🔥🔥🔥
Actually lemme just change the colour of that fire to blue...mmm... No emoji to match but you get the point... Teehee!!!
😂 we can blueshift the flames!
@@vt.physics lol! Clever! 😂
Brief and clear... Thanku so much ma'am.
So quick and brief
Such a wonderfull explanation!! Thank you so much mam.
Woaah ! What an explination , Love it
Consider the following: "IF" temperature dictates whether a star is red or blue shifted, then how could 'red shift observations of stars' ONLY be concluded as 'space' itself is expanding? And what exactly is 'space' that it can expand?
it was great , I have biophysics exam , it helped me understand the whole material , thank you so much !!!
Such a great video!! Also what could be the explanation behind the yellowish tint we always see of the sun 3:23 ?
A star emits a range of wavelengths in its spectrum but it peaks at one particular wavelength. So a star might appear more yellow if the peak intensity is in the yellow visible light region.
@@vt.physics but doesn't it peak near the green region?
@@satishmhatre2943 yep, you're right. It peaks around the green region, so it emits the most green light. But if you watch the end of the video, it explains how our eyes favour certain colours.
And another factor that comes into play is the earth's atmosphere/climate. The amount of scattering differs depending on the wavelength. The atmosphere tends to scatter blue light more.
So... White light (combination of all visible lights) minus blue light gives predominantly yellow.
Very helpful,understood the concept.
Wow crisp explanation...
Perfection on its peak , for a particular video ...VT physics law 🥲♥️
Wow what an explanation!! :)
Thank you for making this! Me likey
Tomorrow is my exam and this helped a lot in short time.. Big up
Thank god I came across this....very well explained 😍🥰
loved the explanation .. thanks 😊
Wonderful work.... Thanks a ton♥️
I finally got it !!!.Thanksss also are you an astrophysicist?
my degree was in pure physics but studied a few astro modules at university
Nicely explained , thanks
Great explanation....
Really good explanation 👍👍
Dude u make awesome content why don't u have the ruby play button u make concpets seem simple using just the iPad and ipencil bravo 🤗🤗🤗😊😊
Thanks dude for your support! Glad you like my vids. Play Button seems like a long way... but I'm working at it!
Thank you for the explanation.
Tysmmmmm! I couldn't understand this with my tb
Amazing explanation ❤
Thank you very much for this beautiful and clear explanation.. I kindly want to ask about that mathematical process, when I calculate it i found the result as 4.99 x 10^-7
this is the best 👌👌👌👌👌👌👌👌
great explanation thanks al lot.
Did you just say that the sun was green?!
Nice
Thank you
This was soo helpful
Good video :)
Dude my phy teacher cant explain it this well.
How hot is the sun? Yellow
what is the wavelength of bluelight??????
Dear Professor,
Max Planck constant is the smallest unit in nature.
how can it be that h/2pi is even be smaller?
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.
it's a a beautiful explanation.
thank you Professor.
Thanks
Thnkks
What software is this???
Wow
Mam but if colours shifts towards left when temperature is increased . Then why is the rod appearing red when heated , it must be appearing in some other colour like blue or indigo because of high temps ?
You're completely correct. When the rod is heated to a higher temperature, it will appear more blue. There's also the saying that something glows white-hot when it radiates the entire visible light spectrum.
@@vt.physics but mam if an iron rod is heated to high temperatures and turns white in colour, why does such a big radiating structure like the appear to be green in colour? Is there any other factor affecting the max wavelength apart from temperature?
@@redsalt69 peak wavelength isn't quite the same thing as the color we see. What we see is a combination of the wavelengths of light being emitted (or reflected) by an object AND how our human eyes work. The "cones" in our eyes are not sensitive to all wavelengths of light, so something putting out a lot of light in a wavelength we can't see may not appear to glow at all (for example, infrared or ultraviolet).
I call this Yummy physics 😋, thanks for your great way of explanation 👍
i call ur mom yummy too
Plaase turn on your CC please 🙏😌😌
for some reason youtube removed auto CC for this vid. Thanks to you I've just realised it! I've manually added subtitles to it!
Metres Kelvin is a very unusual unit.
I keep seeing it as milliKelvin🤣
How do you define intensity
Power per unit area
@@vt.physics what does that mean in layman’s terms
@@hosoiarchives4858 you can think of it as the amount of energy that lands on a certain area within an amount of time
great info... except the bit about flame colors at the beginning - that's just photo-emission in the plasma of the flame. Natural gas burns below 1700K and that is nowhere near the temperature needed to peak in the blue end of the blackbody spectrum.
Uv catastrophe explanation
Hi
Notification Squad!!
I like your videos but cant get past the 10 second mark because of the horrible background noise. Can you please tell me if you have made any videos where your annoying noisey neighbour is not playing his music while you are talking?
First!
At 2:06, you misspelled Wien as Wein. Unsubscribed.