Transcript:

So let's talk about electricity. So, what I was told in school was that electricity travels at the speed of light. You switch on a switch, and poof, the light bulb comes on because it moves at the speed of light. But that does not make any sense, because if you look at diffusion of electrons across the wire, it is not even close to the speed of light. So then what's going on?

So I started looking into it, and I found this excellent, excellent explanation from Veritasium. Go look it up on YouTube. Veritasium, it's a channel. He actually explains how this electricity moves at the speed of light.

It has to do with the Poynting vector, which is the cross product of the electrical field and the magnetic field, divided, of course, by one over mu-nought. But anyway, look it up on Veritasium.

It is completely wrong to have in your head that electrons travel along a wire at the speed of light. That's not how it works.