四维时空中库仑力和引力的方向
The direction of Coulomb's force and the direction of gravitational force in the 4-dimensional space-time
摘要：
本文指出，作用在粒子上的四维力在四维时空中总是沿着与粒子四维速度正交的方向，而不是沿着粒子与作用源的连线。这个推论显然得到四维矢量速度的大小为常数这一事实的支持。这种正交性为力的概念带来了许多新的方面。本文发现麦克斯韦方程组可以由经典库仑力和正交性导出，某些引力效应如行星近日点推进等也可以用正交性来解释。
英文摘要：
In this paper, we point out that the 4-vector force acting on a particle is always in the direction orthogonal to the 4-vector velocity of the particle in the 4-dimensional space-time, rather than along the line joining the particle and the action source. This inference is obviously supported from the fact that the magnitude of the 4-vector velocity is a constant. This orthogonality brings out many new aspects for force concept. In this paper it is found that the Maxwell's equations can be derived from classical Coulomb's force and the orthogonality, some gravitational effects such as the perihelion advance of planet can also be explained in terms of the orthogonality.
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