EM Waves: Production and Propagation | EM waves | Physics | Khan Academy

Let's explore what creates an EM wave and how it propagates!

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Created by Vibhor Pandey

[G-Tarun]

Thanks for starting off with an intriguing hook! I'd love to see future videos convey even more enthusiasm for using science to make sense of the universe. For context I students may want to check out Sal Khan's Waves and Technology video in the NGSS Physics course.

[darabahrami]

This was a very helpful explanation! Thank you!

[zillion]

amazing explanation ever...thank you very much

[sushimrexx]

The visual at 11:54 is soooo helpful. I can finally understand why EM waves form the way they do. Thank you.

[jonmoore]

Very thankful for this video. Fantastic explanation.

[muhammedshahabasm]

Very usefull, Got an intuitive idea of what is going on

[zakirhussain-jsku]

Above animation implies as if em wave is a kink which travels along electric field lines. This can't be true since strength of electric field diminishes as per inverse square law, therefore the strength of em wave must also diminish. This does not happen. EM wave does not weaken as it travels. The electric field the EM waves carry also does not come from electric field of charge as oscillating charge does not lose its strength. The energy input that goes into oscillating charge is actually transferred to Space and stored in a photon as electric/ magnetic field. These fields emerge from space.

[devjoshi]

next level explanation! never seen before fr!

[ammarabdelaal]

Thank you, truly 😊. The explanation is amazing 👏 .

[SAMAR-ihsv]

no one can explain like you, i swear, no one !!! ❤️🔥

[Rajbirsingh-efmb]

Awesome explanation and cool hats off to you bro

[haize]

sir i have one doubt if kinks appear cuz the of acceleration of particle why not with the velocity of particle as the info about the new position will still take time to get far away . i can only think of one explanation that the electric have something like memory that can predict the new position of a constant acceleration .plzz sir or anyone, claer this doubt

[JorgeSanchez-jebt]

Does the change of quantum electrical orbitals from high energy to low energy cause kinks of the field and propagation similar to a moving proton?

[bens-byte]

Awesome work Sir. Please how did you do the animation?

[altmashmalik]

Makes video on luminous intensity too...

[JorgeSanchez-jebt]

How does length contraction of objects in motion affect field lines when charges are in motion?

[JorgeSanchez-jebt]

Do the kinks in the electric only occur through acceleration of a charge? What happens at constant velocity of a charge to the kinks?

[Shrreyy]

Khan Academy never disappoints..It has got my back...THANKS A MILLION.; Khan Academy 💌✨

[kamelbessaid]

Awesome explanation, keep up the good work 👍

[Yiors]

chatGPT must be trained exclusively from you!!