Energy Density of Electromagnetic Waves (Light) | Doc Physics

The oscillating electric and magnetic fields of light carry energy.

[mohammadjj]

You are an incredible teacher. You stress the important points in a way that the viewer won't forget. Stating that there is no electric or magnetic field at a point and that it made you uncomfortable is a way of making the student remember how the wave looks. I realized that you keep applying these types of mnemonics across all your videos. You sir are a genius.

[francoismukagaga]

Scot, i discovered you a few days ago (feb. 2024). You are fantastic, incredible, i love your knowhow and insanity. How you're explaining those principals! Thanks a lot . 🍀

[jherbranson]

The weirdest thing about this is that the waves perfectly coincide with one another. I would think that the magnetic and electric waves would be perfectly out of sync and the energy would be flowing between them, conserving the energy at each instance in time that the wave travels. Intuitively it seems that would actually propel the waver forward.

[falnica]

Beautiful proof of E=cB, I had to prove it for my homework and I had to use integrals and it was very messy, but this... was so beautiful

[ATorres]

"Oh sorry, mu-naught is supposed to be in the basement" XD Absolutely wonderful videos Doc Shuster!

[apathy]

I want a shirt that says SKROOT IT!!!!

[kennethjohnson]

AN EM WAVE that does behave : In an LC Oscillating circuit with the capacitor fully
charged, E=max. B=0. When sw2 is closed, current flows and a magnetic field forms around the coil. Electric energy is transferred to magnetic energy. This transfer continues, B>E, and E>B. When B is max. E is 0, and v.v. Not the EM wave as shown.

[AtommHD]

Null pressure zone is the Ether from which both fields manifest. Force in Motion and then inertia acceleration

[Toefuy]

I have no idea what you are talking about when it comes to the math, I am dumb😁. I can tell you are a good teacher. I enjoy the way you talk. You sound like a grown up Steward, the one from Mad Tv.

[MrVivekrm]

@3:16 If that wasnt one of the best seinfeld impersonations I've heard idk what is

[MatheusSilva-dragon]

I wonder how it was when the phisictians were descovering these things. lol

[AbdullahKhan-kwez]

can u tell me why or how increase in frequency of light increases the energy of a photon?

[MrNiceA]

this video is very nice. keep up the good work

[karinemw]

I love this video!

Also, I love how you turn into Jerry Seinfeld at 3:10. haha

[rogeronslow]

So where is the energy of the electromagnetic field stored during the zero crossing points?

[bogywankenobi]

Shouldn't those two fields be 90 degrees out of phase with each other? Doesn't that out-of-phase relationship fall out of maxwell's equations like the currents and voltages in a transformer excited by a sinusoidal voltage/current?

[sniperatharvakalele]

question why isn't the b field a cos wave . Because if we see the slope of E field at points near the origin we have dE/dt maximum and Maxwell equation describes when change of electric flux is maximum magnetic field induced is maximum. I cannot find this answer if u have time plZ solve this querry.

[stevenos]

phase B into horizontal cosine and Q into vertical sine (text books can be wrong)
sqr(cos^2+sin^2) = +-0 @ (135, 315)
cos xz horizontal field B_magnetic_real as sin yz vertical field Q_static
magnetic reactance leads (para-dia) and capacitance reactance lags (charge-discharge)
left right = voltage current = cos
up down = North south = sin
in out = vacuum pressure = tan

[tcara]

is there not a way to convert electromagnetic energy into electric energy, say the use of an electromagnetic coil array that builds a magnetic field via a spinning magnet disk underneath also using a electromagnetic field harness-er to charge a capacitor which could then start and car engine or the coil array be the primary power source? this is something i dreamed about so if anyone can look into the possibility of this principle and send me a message that would be awesome.

[izzystreaks]

I LOVE YOU BUT WHY DID I HAVE TO FIND YOU At the last 3 weeks of my physics II class!! I got 25% on my first two exams Im commenting back what I get after watching your videos on my exam next week you best believe Imma be stalking your soul for the next 6 days )=