Recent content by AlanTuring

No it does not make sense that there is a field line at every point, which is why I ask the question... However, I know space is continuous, formulas use integrals, etc. But the "conceptual" idea of field line at every point seems contradictory with the idea of saying that there are denser...

On another forum someone says that "there is a field line passing through every point in space " ... what would that mean? It doesn't seem to make sense to me... we would need to have less field lines in some regions otherwise it would be all the same

Thanks, I understand that, this is not really my question though. My question is rather, can we consider there is physically "more lines" passing through a region? Can we say "informally" : if more field lines pass through an area of x square meters then the field is stronger?

I'm trying to understand the relationship between the "number" of field lines passing through a region and the magnetic force in this region.I understand that the drawings are of course conceptual: we cannot draw "all" the field lines (although can be visualized with iron fillings).Also the...

Hello, i am having a hard time understanding the proof that a covariance matrix is "positive semidefinite" ... i found a numbe of different proofs on the web, but they are all far too complicated / and/ or not enogh detailed for me. Such as in the last anser of the link : probability -...