thanks! a friend of mine ended up having griffiths, and i guess it was just the way purcell explained it that tripped me up, because after reading the relevant sections there it cleared up immediately.
yeah, not so much the actual relativity work (I've always found it to be more or less of a breeze), but the application to electric fields and magnetic fields.
essentially, my biggest problem right now comes down to magnetics. i know that E' parallel=E parallel and E' perpendicular is equal...
My honors physics course is working with Purcell's textbook, but I've found some sections of the book are quite wordy and hard to follow, and i don't have any way to check my practice work: there are virtually no answers to any of the practice questions.
thanks in advance!