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## Main Question or Discussion Point

A point charge accelerating through space generates an electric field and radiates energy. But how is this influenced if the point charge is moving along the field lines of an external electric field? Specifically how is calculation of radiated energy effected? Would you add the external field to the radiative component of the electric field (the 1/r dependent part) when calculating the Poynting vector, or is wrong?

Thanks.

Thanks.