Simple question, or is it...

Toss in some Babble verses and it's a show that never ends.

Oh, you mean like this? 😃

djones51
When I was a child, I talked like a child, I thought like a child, I reasoned like a child. When I became a man, I put the ways of childhood behind me.

Getting back to the dodgy subject of does the signal travel inside the conductor or outside the conductor, the speed of the signal in a copper conductor is measured to be some high fraction of the velocity of light in a vacuum, let’s say it’s 85% of c for the sake of argument. But if the signal were mostly traveling OUTSIDE the conductor - in air - as some have argued, wouldn’t the speed of the signal be a lot closer to the speed of light in a vacuum? Or about 99.9% of c, not 85%.

That was in response to this 


"

That which is hidden from the most learned is revealed to mere children."

I doubt anyone has a stereo system in a vacuum. Anyway speaker wire doesn’t carry audio signals but an electrical description of the audio. That electrical pulse is carried in the wire mostly the outer 1/3 of the wire.