Perfect! The only correct explanation I found on TH-cam. All other youtube videos were filled with non sense explanations where teachers themselves were unclear about the topic.
3:52 e- gets excited, almost instantly deexcites and releases that energy. 8:02 intensity= more no.of photons 8:47 more KE- electrons coming out with more energy
I really like listening to you explain because you sound so excited about the topic you're teaching it makes me smile and want to learn it as well. Not to mention you explained it well too!
Sir, I don't know how words can express my gratitude towards u When u teach I can feel ur sincerity and enthusiasm Such a rare and precious quality it is ❤ , making these videos all the more valuable. It doesn't even feel like studying 😂 it's like a story telling session. U really help me understand the basic idea behind these topics. Phy has become my fav subject😊 Thank u so much!
Great video....But I have a confusion....What if more than one photons collide with the same electron?? Does the kinetic energy of the electron increase then?? Obviously, It can't be. That's the whole point of photoelectric effect. But why not??
He said that when one photon hits one electron and if the energy of photon is less than work function, the electron excites to other energy level and immediately deexcites and comes back to the same energy level so quickly that other photon can't have a chance to hit the same electron. But we know that speed of the light is fastest. So even I got a doubt with that one.
Sir I have a hypothesis in favour of WAVE nature of Light. The rationale that we use against WAVE nature of light is that Photoelectric Effect is a function of FREQUENCY. And observation of Threshold Frequency is hard/impossible to explain considering Light a Wave. However, FREQUENCY is related to WAVELENGTH (λ = v/f). So perhaps, Photoelectric Effect is not actually a function of FREQUENCY at all, but rather a function of WAVELENGTH. On similar lines, there may be a concept of Threshold Wavelengtb. I.E. wavelenth needs to be sufficiently small to enable INTERACTION with electrons of a candidate element. Would this perspective continue to support Wave Nature of Light? (without getting into fuzzy concepts like Photon and Duality)?
Every day I can watch the amperage jump on my solar panels when the sun gets lower in the sky (when the UV is the highest) even though the angle of light has been reduced, this totally explains that!
With your ping pong ball example, is it because increasing intensity is like throwing many ping pong balls at a slow speed? Where higher frequency light is like throwing a ping pong ball at a higher speed?
Perfect! The only correct explanation I found on TH-cam. All other youtube videos were filled with non sense explanations where teachers themselves were unclear about the topic.
No one explains like you sir.. I'm grateful to Khan Academy
3:52 e- gets excited, almost instantly deexcites and releases that energy.
8:02 intensity= more no.of photons
8:47 more KE- electrons coming out with more energy
He is the best teacher i ve ever found and the best khan academy has.
Man you are a gem i mean everything abt u is just perfect your voice ,explanation just perfect, knowledge.
Thank you sir for such a amazing explanation .💯💯💯👏👏
I really like listening to you explain because you sound so excited about the topic you're teaching it makes me smile and want to learn it as well. Not to mention you explained it well too!
Incredible explanation. Many thanks to you and the Khan Academy team for being so generous in your explanations!
Hats off to you brother. you are the reason iam gonna pass my exam tomorrow. they way you teach is so beautiful. Thank you
Love from Pakistan sir ... your teaching method is amazing ❣️❣️❣️🙏🙏🙏🔥🔥
Nobody was explaining why wave model can't explain photoelectric effect, but like everytime u told us the whole concept, U r the SAVIOUR..
Sir.really I'm so thankful for your efforts. You explained a whole chapter in 10 minutes! Hats off to you!
Thank god for these people thank you!!!!!
Extremely helpful video - thank you so much
First to comment , first to view , first in my school class too 🎖🏅 it's all due to khan academy
Very good explanation as well as love and respect from pakistan❤❤
Best way of teaching
Outstanding 👍
This guy is just too good!
Sir, I don't know how words can express my gratitude towards u
When u teach I can feel ur sincerity and enthusiasm
Such a rare and precious quality it is ❤
, making these videos all the more valuable.
It doesn't even feel like studying 😂 it's like a story telling session.
U really help me understand the basic idea behind these topics. Phy has become my fav subject😊
Thank u so much!
Ty for these videos and please keep posting them :))))
I can't adequately thanks khan academy for this enormously informative video
Amazing. The way you describe things is amazing.
The best of the best of the best of the BEST
WHYYY ARE GOOD THINGS UNDERRATED : (
Dude ,this was a great explanation 👏 👌
this video is absolutely perfect! much appreciation from Sydney!
Really from Sydney
The only Chanel that give me knowledge of how things happen. Million thanks
Best explanation ever,
How can I get all of physics contents made by you in english
Great explanation
thank you sir, believe you made me ready for my paper 2moro
Thankyou so much!
mahesh, God Bless You!!
thank you very well explanation
Please make videos for colleges and universities students too.
This is literally the best
Great video....But I have a confusion....What if more than one photons collide with the same electron?? Does the kinetic energy of the electron increase then?? Obviously, It can't be. That's the whole point of photoelectric effect. But why not??
He said that when one photon hits one electron and if the energy of photon is less than work function, the electron excites to other energy level and immediately deexcites and comes back to the same energy level so quickly that other photon can't have a chance to hit the same electron. But we know that speed of the light is fastest. So even I got a doubt with that one.
I owe my entire academic career to khanacademy
Fabulous ❤
Sir I have a hypothesis in favour of WAVE nature of Light.
The rationale that we use against WAVE nature of light is that Photoelectric Effect is a function of FREQUENCY. And observation of Threshold Frequency is hard/impossible to explain considering Light a Wave.
However, FREQUENCY is related to WAVELENGTH (λ = v/f).
So perhaps, Photoelectric Effect is not actually a function of FREQUENCY at all, but rather a function of WAVELENGTH.
On similar lines, there may be a concept of Threshold Wavelengtb.
I.E. wavelenth needs to be sufficiently small to enable INTERACTION with electrons of a candidate element.
Would this perspective continue to support Wave Nature of Light? (without getting into fuzzy concepts like Photon and Duality)?
Every day I can watch the amperage jump on my solar panels when the sun gets lower in the sky (when the UV is the highest) even though the angle of light has been reduced, this totally explains that!
Thanks
Thanks a lot 🙏 💓
You are the best of the best of the best❤❤❤❤❤
Why this channel is so underrated 😭
Great teacher
Hey, I love you. Continue with your job.❤
Whenever I find a video which is Created by Mahesh Shenoy, I immediately click it; Even though that's irrelevant to my stream.
I hope I am not alone
Thanks 😊
Make such video on blackbody radiations🥰🥰🥰🥰🥰
Startled 🤩
First! 😁
Am going to top my class with such lessons
Could you also plz explain, the failure of wave theory on explaining black body radiation?
Awesome explanation sir 🙂🙂
Amazing
Thanks sir🙏🙏🙏🙏
I cant find all videos in one place
yes... please put in playlist in order please
Sir I don't know how to thank u 😊.
FloatHeadPhysics the best
First view first comment
Heads off to uh sir.....🙏🙏
How does the wave theory fails to explain black body radiantion?
With your ping pong ball example, is it because increasing intensity is like throwing many ping pong balls at a slow speed?
Where higher frequency light is like throwing a ping pong ball at a higher speed?
my country here to save me from near doom once again, normal khan academy doesn't explain shit
jai hind!
Sir explain UV catastrophe
Thank you sir!!
love from Pakistan 💖
Why not my teacher get this video?
Very well explained