Just what is a "wave", anyway? Are there different "kinds" of
electromagnetic wave? If so, what are they? Does a "wave" have to travel
in order to be a "wave", or can it just "vibrate" or "oscillate"? Or
just "stand"?

Most of my references call a standing wave a "pattern". Is a "pattern" a
"wave"? Can a "wave" be a "pattern"?

That should be good for another few hundred posts, at least. Sheesh.

Roy Lewallen, W7EL