[NonLinear]

That reminds me of when I took physics, and we kept talking about an electric field around an infinite wire. I know it was presented that way in order to simplify the mathmatics, but I got so hung up on the impossibility of an infinite wire that I couldn't grasp the mathmatics.

I had the good fortune to have an excellent physics professor. He talked about "an ecectric field around a wire, while for the moment, neglecting end effects."

[exDemMom]

He talked about "an ecectric field around a wire, while for the moment, neglecting end effects."

That would have been a lot more understandable than having the professor talk about that impossibly infinite wire!