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A: (PH) In addtion to the external force, if the charge is accelerating
there is a radiation reaction force on the charge. Both forces
must be taken into account to calculate the acceleration. Alternative
formulation: F=dp/dt, but you need to account for the momentum carried
away by the EM field, whose 3rd law action-reaction counterpart
is the radiation reaction force. I'm trying to find a pedagogical
reference where this is explained. So far, no luck.
Results of poll on pace of
class.