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When real electrons are pushed, they push back: an accelerating
electron drains energy by radiating it away. In effect the
electron feels a resistence, called radiation resistence, and
extra force has to be applied to overcome it. . . . Because of
radiation resistence, an electron in an atom, alone in empty space,
loses energy and dies out; the lost energy has been radiated away
in the form of light. To explain why this damping takes place,
physicists assumed they had no choice but to imagine a force
exerted by the electron on itself.
By what else,
in empty space?
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