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Re: [Phys-l] EM, is it energy



Referring to John's post (snip below) how can something be more abstract than a field. I get the whole abstract nature of energy. You and others have influenced me enough to try to make that point clear to my students but more abstract than a field how can that be?


Energy is an abstract thing. It is more abstract than books,
more abstract than trains, and even more abstract than EM
fields. It is a perfectly real, well-behaved thing, just a
little bit abstract.