Nice. And this is in contrast to pushing water (sound wave), where the wave propagates only at the speed that molecules bump. Like, if I'm in a big line, and someone pushes at the back of the line, I only get pushed by the person immediately behind me. An electron is able to be pushed by electrons at the back of the back of the line. The electron immediately behind an electron will push hardest, proportional to inverse square law. But when there are twenty electronics behind, and the very last one pushes, it has a decreasing effect on all electrons in front, but at time 2, those movements allow propagate forward, etc etc.

Wish I could visualize that. Oh yeah. Ha!

I like you spindle representation of inverse square law.