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  • $\begingroup$ Related: physics.stackexchange.com/q/19174/2451 $\endgroup$
    – Qmechanic ♦
    Commented Feb 20, 2012 at 19:07
  • 2
    $\begingroup$ There is no "mechanism". It is simply your perspective that changes. Think of something looking different from frontal view and side view. $\endgroup$
    – Siyuan Ren
    Commented Feb 21, 2012 at 1:15
  • 1
    $\begingroup$ Physicists are confused in this matter. Let's say we have two parallel lines of electrons, and an observer moving along the lines. The observer says that the lines repel, because of the charges, and because of length contraction the repelling force is increased. Then the observer says that the electrons move apart at slowed down speed, because of time dilation. Now the observer, who is a physicist, says that the attractive magnetic force that should be there between the lines, is the same thing as the time dilation of the moving apart of the electrons. Particularly the last part sounds silly. $\endgroup$
    – kartsa
    Commented Feb 22, 2012 at 0:24
  • $\begingroup$ Thanks kartsa, its good to know the current state of affairs $\endgroup$
    – Nitin Nizhawan
    Commented Feb 22, 2012 at 6:28
  • $\begingroup$ @kartsa Are you assuming that the Lorentz force is an invariant? It is not. $\endgroup$
    – ProfRob
    Commented Oct 20, 2021 at 11:03