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_{1}and p

_{2}, where the distance from the source (a wire carrying a current, for example) to p

_{2}is greater than it's for p

_{1}. Is the shape of the curve correct? Is it correct that t

_{2}-t

_{1}/c is the distance traveled by the wave? Also, why is the final magnitude of B less in p

_{2}than it's in p

_{1}(what occurs in each point right after the wave pass)?