I checked http://www.cco.caltech.edu/~phys1/ja...ge/movingcharg...
It aggrees with Dr.Yoon's idea, in terms of having mobile character of electromagnetic fluxes( field lines), depending on moving charge. However in the case of charge moving in straight it is self-contradiction. All the moving field lines build curved shape, based on the condition, there is a time lag between moving charge and field lines it produced. Then why in the case when the charge moves in straight, the field lines do not shift behind the charge it there exist also time lag between them? It should naturally have to shift behind the charge so that the front of the charge will experience no field lines. newedana