8.2.5 Reflection and Transmission at Oblique Incidence

8.2.5 of Griffith's Introduction to Electrodynamics 2nd Ed
This is how you handle waves coming at an angle to the boundary between two linear non-conducting media.
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[@jacobjohnson1729]

You may not be reading this specifically, but your videos are the reason that I'm gonna be able to graduate with my degree. Wouldn't be in school right now without you. This is really the best resource for learning this material on the internet and you have my upmost thanks!

[@jg394]

Thank you. Good luck with your career!

[@alankarjoey258]

it helped me a lot...please keep this good work on...thanks

[@muhammadnisarqasim636]

sir how we can derive that equation in which we can find sin brewster angle.

[@IshaniThakur]

great work :)

[@parnikatyagi503]

Thank you soo much!. Could you elaborate more on Kappa vector(k)?

[@careereasy9679]

kzbin.info/www/bejne/rZXVc5Jvh56JoJo must watch it will help u

[@bhagva8268]

what about x-component of (k.r)s

[@BugMagnet]

Thank you for the very detailed derivation of these formulas. Having watched it, I have one question. How would one calculate the reflectivity and transmittivity through several layers of different dielectrics?

[@jg394]

That's a completely different topic. The reflected waves may interfere with each other depending on the thickness of the material and such.

[@BugMagnet]

@@jg394 Exactly. My problem is, I found a transfer matrix to represent the effect of the partial reflexions and transmissions of the multi bounce, but it is dependant on wave impedances. The formula for the transmittivity of that paper does not work though. It has no brewster's angle for example. Looking at alternatives, all I can find is formula's based on the refractive coefficient that do not play with the transfer matrix. I was wondering if you had the "You will find it in that book" info perhaps.

[@jg394]

I was thinking that I need to do Boas before Intro QM. You've just reinforced that idea.

[@waficlabban8658]

2:14 why did we take the cross between K and E???? wouldn't that mess with the units?

[@parnikatyagi503]

to find B(H) field, look up maxwell's equation. (EXH=K, KXE=H)

[@phy_dude]

Thanks a bunch

[@ahmedhegazy699]

20:38 You didn't show why is theta_B simplified this way. Why the sine^2 is as approximated in the text??

[@jg394]

True, I skipped that.

[@careereasy9679]

kzbin.info/www/bejne/rZXVc5Jvh56JoJo must watch it will help u

[@timmusician5060]

Some examples would be nice.

[@BASHA6365]

what n1 and v1 reprents??

[@careereasy9679]

kzbin.info/www/bejne/rZXVc5Jvh56JoJo must watch it will help u

[@evancooper7336]

You really need to explain why this negative pops up, this is not clear at all and took me several days to figure out.

[@jg394]

sin -theta = -sin theta (sin is an odd function)

[@careereasy9679]

kzbin.info/www/bejne/rZXVc5Jvh56JoJo must watch it will help u

[@johndesmond1260]

What's the rush? A little more time in explanation would be very helpful. Seems you are just repeating what is in the book. Also, don't you have a Kleenex?

[@jg394]

Yes I am lecturing from the book. No I did not have a Kleenex.

[@gfarj]

you are such a good teacher... please, make some video presentation about mary L. boas book (mathematical method in physical science). btw, I love the way you made physics look easy..

[@jg394]

n is the index of refraction from Snell's Law. v is the velocity of light in the material. n1 v1 is on the left side, n2 v2 on the right side. At this point they are entirely determined by the material. Later on, we'll discover a frequency dependency.

[@careereasy9679]

kzbin.info/www/bejne/rZXVc5Jvh56JoJo must watch it will help u

[@__shubham_raj]

why is E0iSin theta negative? didn't get the point

[@vamsihemadri]

great video...what about saving trees?

[@luisbreva6122]

How convenient that you casually skip over the derivation of the expression for Brewster's angle