Photoelectric effect explanation using quantum theory | Dual nature of light | Khan Academy

Let's explore how the quantum theory of light explains the below experimental results of photoelectric effects.
1. The kinetic energy of the photoelectrons are independent of intensity but depend on frequency.
2. Below a minimum frequency called the threshold frequency, no photoelectric effect takes place, even if the light has very high intensity.
3. Photoelectric effect is almost instantaneous.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help!
Created by Mahesh Shenoy

[RishuKumar-ddds]

Perfect! The only correct explanation I found on Youtube. All other youtube videos were filled with non sense explanations where teachers themselves were unclear about the topic.

[rahmeenmujahid]

He is the best teacher i ve ever found and the best khan academy has.

[vaishnavchandra]

No one explains like you sir.. I'm grateful to Khan Academy

[prathameshwagh]

First to comment, first to view, first in my school class too 🎖🏅 it's all due to khan academy

[VG__]

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

[amirnaik]

Man you are a gem i mean everything abt u is just perfect your voice, explanation just perfect, knowledge.

[minimilitiatech]

Love from Pakistan sir ... your teaching method is amazing ❣️❣️❣️🙏🙏🙏🔥🔥

[oniichan]

Hats off to you brother. you are the reason iam gonna pass my exam tomorrow. they way you teach is so beautiful. Thank you

[Shrreyy]

Nobody was explaining why wave model can't explain photoelectric effect, but like everytime u told us the whole concept, U r the SAVIOUR..

[Caravanseraii]

Very good explanation as well as love and respect from pakistan❤❤

[nerimaken]

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!

[pranavtejankar]

Thank you sir for such a amazing explanation .💯💯💯👏👏

[haroentmimi]

Incredible explanation. Many thanks to you and the Khan Academy team for being so generous in your explanations!

[fhrwzhg]

Sir.really I'm so thankful for your efforts. You explained a whole chapter in 10 minutes! Hats off to you!

[nayanashaji]

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!

[musagaye]

The only Chanel that give me knowledge of how things happen. Million thanks

[studylife]

I can't adequately thanks khan academy for this enormously informative video

[panda]

Ty for these videos and please keep posting them :))))

[Bobybrown-jzuk]

I owe my entire academic career to khanacademy

[dhruvagarwal]

Dude, this was a great explanation 👏 👌