4 ms·
One early misconception I had about EM was that there were discrete 'lines' of force. I guess this either arose from iron filings experiments or from the way th
by tremendulo 9y ago
One early misconception I had about EM was that there were discrete 'lines' of force. I guess this either arose from iron filings experiments or from the way the diagrams of fields are (perhaps unavoidably) drawn. But now I know the fields are continuous.
- alphydan 9y ago> But now I know the fields are continuous. Wait 'til you hear of quantum electrodynamics ;)
- Koshkin 9y agoTo be fair, this is about classical electromagnetism. What is annoying though, it is the pervasive practice according to which some authors completely ignore H ("intensity of the magnetic field") while others pretend to know nothing (and nor should their students) about B ("magnetic induction"). Somewhat less annoyingly, the teachers of electromagnetism rarely introduce the students to the formulation in terms of differential forms, which many consider a better, more intuitive way of doing electrodynamics compared to vector analysis (which student still should learn, of course).
- agumonkey 9y agoI'm still confused by the notion of line/field/flux density. That said, I found a few books to read about that.
- Koshkin 9y agoThis may be a good explanation: https://www.uio.no/studier/emner/matnat/fys/FYS4160/v08/undervisningsmateriale/Kursmateriell/forms_teaching_warnick.pdf https://www.uio.no/studier/emner/matnat/fys/FYS4160/v08/unde...