"lu6etj" wrote
...

D: Kraus says: "a charge moving at uniform velocity
along a curved or bent wire it is accelerated and radiates".
The clue was in words "straight wire" , he says: "Electric charge
moving with uniform velocity along a straight wire does not radiate".

This principle is used today to produce the light in the free electron
laser: http://en.wikipedia.org/wiki/File:FEL_principle.png
S*