1. The problem statement, all variables and given/known data Why, IF electrons really orbited atoms, would they lose energy? 2. Relevant equations 3. The attempt at a solution I realise they're meant to emit light. But why? I understand vaguely that the E field might be changing with time, since you have a changing magnetic flux... but where does the changing E field come from? Unless I guess it's just a self supporting process (changing B field *causes* changing E here...) - is that just what a light ray is?? Many Thanks!!!