OK FINE, magnetism is explained away by relativity

[Dropout]

http://psi.phys.wits.ac.za/teaching/Connell/phys284/2005/lecture-01/lecture_01/node13.html

But what about induced current? My brain is full now, can't think.hehe: http://www.physics.uoguelph.ca/applets/Intro_physics/kisalev/java/indcur/index.html

 

[lbrits]

Afaik there are configurations of the electric and magnetic field (dependent on the sign of $$E^2 - B^2$$, which cannot be transformed into purely electric configurations by a Lorentz transformation.

 

[George Jones]

$E \cdot B$ and $E^2 - B^2$ are both Lorentz-invariants. If $B=0$ and $E \neq 0$ in one frame, then $E \cdot B = 0$ and $E^2 - B^2 > 0$ in that frame, and hence in all frames.

Also, if $E \cdot B \neq 0$ or if $E \cdot B = 0$ and $E^2 - B^2 < 0$ in one frame, then there does not exist a frame in which $B = 0$.

 

[Dropout]

No comprende, but thanks for the effort.