Electromagnetic Boundary Conditions Explained

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In this video, I introduce the concept of 'boundary conditions' - or how the electromagnetic fields in one material affect the adjacent fields in a different material. I use Faraday's Law to derive an equation relating the tangential electric fields between the two materials.

This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.

Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.

[poseindonpiril]

My EM II prof said I shouldn't try to attempt to visualize EM, but this is exactly what I needed. Thank you!

[ozzyfromspace]

You explained it to me like I was a little kid, and you know what? I’m not mad. Your explanation is EASILY THE BEST one on YouTube, and trust me, I’ve been around many a channel. Thank you for prioritizing clarity over fancy talk. You’re a real one, Jordan. Best wishes with your channel 😊🙌🏽🎊✨

[EigenA]

Great work, I wish more people would adopt your clear and concise teaching method.

[brandyngabel]

Thank you!! My EM teacher sucks, and the class is super hard. The material is actually easy to understand when it's explained well like this.

[michaeljburt]

I'm an EE and been reviewing some of your videos on the Fresnel equations, characteristic impedance, etc. Boy do I wish I had these during my undergrad E. Mag. courses ... haha. Thanks for the great content, really brilliantly explained

[SadyaMartínez]

You really made me fall in love more with my career. Thank you, you remainded me why this is worth it!! Have a great day.

[quasar]

I was stuck with this concept for the last two weeks. I tried to visualize it, worked on it but couldn't actually get to the point where I could actually understand this. But now I can safely say I have grasped the concept of boundary condition. Thank you so much for the video.

[aldojuarez]

Thank you! I struggled with the concept for a week, I finally got it

[memsuniverse]

This is really good point, I always had hard time to understand the BC (boundary conditions), thank you for the great explanation also

[chrissysevigny]

This was really helpful, and felt a lot more intuitive for me, thank you so much for posting!

[xenusonofzarnox]

great grat explanation, simple, clean, thank you.

[Rahul.]

I would have never understand this if it wasn't taught in this way. This is the simplest way one can teach the concept of boundary condition.

[leonidastsigounakis]

I’m currently doing my second year as a EEE student at imperial college london. I appreciate the effort put in these videos. Great Work! :)

[sharada_dance]

I am learning much more from you than from my university professors! thank you thank you!

[donutzzs]

best explanation after an hour long search

[pra]

watched several videos, this has to be best video ! Great work and wonderful explanation.

[agustin]

Incredibly, I understood in this video (in a different language than mine), a few hours of reading in books that I don't quite understand. Thank you

[mahmoudelgeziry]

Thanks Jordan, this was very helpful.

[amirjodeiry]

extremely appreciate of your excellent It was very helpful for me. Thanks a lot .

[gauravmishra-oinw]

Thank you for this excellent visualization and explaining the boundary condition. I have a question regarding the direction of electric field vectors in material and vacuum side. To make a loop, the tangential component of electric field vectors in material and vacuum side may be pointed in opposite direction.