电磁场流体模型理论的基本点是把电磁场运动区分为轨道运动与内禀运动两部分。本文试图从内禀运动部分引出内禀角动量的概念。为此,建立了(虚数)算符;导出了电磁场的自旋角动量与内禀角动量的关系。

The main point of the hydrodynamic model of electromagnetic field [13,14] is that; the motion of the electromagnetic field can be divided into two parts, the orbital motion and the intrinsic motion. In this paper we to define intrinsic angular momentum deduced from the intrinsic motion and a related i (imaginary number) operator. Besides, the conservation property of the intrinsic angular momentum, the relations between the spin angular momentum and the intrinsic angular momentum of an electroma-gnetic field are described.