It is shown that the phenomenon is due to self-induced action in alternative magnetic field of electric solenoid and is of no effect to the point...
结果表明，此现象产生于螺线管交变磁场中的自感应作用，对于碰聚焦点不产生影响。
2
It is shown that the phenomenon is due to self-induced action in alternative magnetic field of electric solenoid and is of no effect to the point of magnetic focusing.