A Quick Intro to Quantum Physics: The Photoelectric Effect

In this video I introduce the photoelectric effect, which introduced the world to the idea of quantum mechanics for the first time.

Does light behave more like a wave, or a particle?

This is the first of a four part miniseries on wave-particle duality.

Subscribe and like this video if you would like to see more content! Suggest ideas below for other Physics/Maths ideas I could present!

Music:
"Gonna Start"
Licensed under Creative Commons: By Attribution 3.0

[suchitrasridhar]

This is one of the best videos on photoelectric effect available online! Thank you for making such great content.

[vedantsgoodlife]

that 'photons-waiting-in-queue' analogy is really good.

[TheTastyAsian]

Thank you so much you're a great teacher! The metaphors especially helped like the speed dating one!!

[stellar]

I like your channel. I myself wanted to make videos about special relativity, quantum physics, astronomy, and the philosophy of it all. Keep up the good work!

[richardaversa]

3:40 Yes, but Einstein was more significantly inspired Max Planck's recent resurrection of the particle model of light to explain the Blackbody Radiation problem

[shubhamsingh]

Excellent explanation of Photo electric effect.

[qualquan]

2 points.
Photons are NOT massleess. Yes their REST mass is zero but not when they are travelling. How much is their masss? It is proportional to their energy where E = MC^2 = hf.
Note E=MC^2 means ALL energy must have positive mass. If M were zero E would be zero too.
Second. If we flood the electrons with high intensity light why cannot multiple photons hit one electron? I believe this IS seen with high intensity lasers.

[johnnychorgo]

A photon is a small magnet with a magnetic field. This is a better understanding than Einstein.

[qualquan]

I should add that as per E = MC^2 A resting photon with zero masss has zero energy or all photons with zero mass MUST have zero energy.