- #1
kq6up
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I understand that an electric field from a string of electrons traveling in a wire gives a steady (magneto-static) field. Since this field is static, it will not cause a EM wave to propagate away from it. I also understand that individual charges that are not accelerating are not radiating since steady motion is frame dependent, and all interesting physics should be frame independent (Noether's Thm).
However, it seems if you were an observer measuring a magnetic field of an electron traveling past you. That magnetic field would be changing in the lab frame. Therefore, the dB/dt term would not be zero. This seems like it should cause a propagating EM wave by my thought experiment. Could someone help me with this apparent contradiction.
Thanks,
Chris
However, it seems if you were an observer measuring a magnetic field of an electron traveling past you. That magnetic field would be changing in the lab frame. Therefore, the dB/dt term would not be zero. This seems like it should cause a propagating EM wave by my thought experiment. Could someone help me with this apparent contradiction.
Thanks,
Chris