What is the photoelectric effect ? (high school physics)

[@user-jz8tx3vl6j]

Great video!!!!❤

[@PhysicsMadeEasy]

Thank you :-)

[@markonar140]

I like the Representation of the Work of the Interaction with the other Atoms of the Metal Plate.. I never Thought about it like that!!! Thanks!!! 👍😁

[@PhysicsMadeEasy]

Thank you for your kind feedback Mark. I am glad the visual representation I have in my mind for this phenomena opened a new angle for your understanding of it :-).

[@jespercairowestergaard4498]

@5m57s: Yes please Edouard. I would like that subject to become a video. And merci beaucoup for this and the other good ones. Cheers from. Denmark.

[@vidhandoshi6623]

Hello Sir. I am a student from India and I love your content so please don't stop uploading new videos, they help me out a lot. Also sir can you please explain the topic of force exerted by photons. Thanks a lot sir 🙏 🙂

[@PhysicsMadeEasy]

HI, thank you so much for your encouraging comment. I am in a video production/posting phase right now, so no worries, but will slow down. All depends on my 'busyness' (the Channel is a hobby for me that doesn't pay bills haha)! Force exerted by photons, you mean in a solar sail for exemple? A photon has momentum (p=h/lamba, be Brogglie equation). so when it bounces on a surface, its momentum changes, therefore it felt a force. 3rd law of Newton imposes that the object that applied the force on the photon (the solar sail for example), experiences the same force in the opposite direction, thus accelerates. Humm, that could be a good subject for a future video, solar sails... thanks for the idea :-)

[@asif530]

Really interesting.. would be really nice to go over the derivation of plancks constant from the work function. It takes us back to the beginning of where quantum leap started

[@PhysicsMadeEasy]

Actually, Plank's constant was born before Einstein was able to theorize the photoelectric effect. Originally, Plank introduce his famous constant to explain why there was no UV catastrophe when a Black Body was heated. Later, Einstein fed on this idea of a quantization constant to show that the photoelectric effect led to deduce the granularization of light. Thank you for your question :-)! It gave me an idea of subject for a future "What is" video: Plank's constant. Now I just need the time haha:-)

[@rajdeepsingh26]

👍🏻

[@mahirbalayev5835]

Hi, photon makes electron to leave solid surface and make material positively charged, does it mean while interaction with material that photon has negative charge and once it was absorbed and disappeared the proton become positively charged?

[@PhysicsMadeEasy]

The photon doesn't carry a charge. Because the electron has left, the material becomes positively charged. So the system electron/material has gained electrical potential energy (the energy of the photon was used to separate the two). Now you just need to capture the electron with a metallic plate located above the material, connect it to the material itself with a cable, and the electron will flow back to the material through the cable: You have now an electrical current... In the end, the energy of the photon has been transformed into electrical energy. How cool is that!

[@mahirbalayev5835]

@@PhysicsMadeEasy i see. Just imagine, that photon has negative charge until absorption, and due to this charge electron ejected from surface, and after absorption/death of this photon this charge disappeared. Surface has become positively charged. If instead of normal matter, to choose surface of antimatter, no positron will be ejected. Or not? If photon is able to do it with antimatter also, then it has not any charge :) (most probably this opinion is wrong, but what if?) is there any observation related to antimatter?

[@PhysicsMadeEasy]

@@mahirbalayev5835 Hello Mahir, No reasoning can work if you consider a photon as a charged particle. In particle physics, photons are the particles that mediate the electric force. That force is what holds matter together in regards to chemistry : All bonds are based on the electric force. If you charge the photon, physics would change drastically, and reality would be fundamentally different, following totally different rules. maybe in some universe, it is the case 😉. You other thought is interesting. You are asking, does the phototelectric effect work with antimatter?: A photon interacting with a metallic surface made of metallic antications and positron, being absorbed and leading to the ejection of a positron: I don’t see why not. Antimatter is a mirror of matter and follows the same physical laws (at 99.99%, there are a few exceptions that were observed and a yet to be understood). good questions