The motion of charged particle acted upon by Lorentz force and other external force are analyzed, calculating formulae of orbit equation and curvature radius are derived.
分析了带电粒子受到洛伦兹力和其他恒定外力作用下的运动情况，导出了轨道方程和曲率半径的计算公式。
2
This paper, on the viewpoint of Lorentz transformation of wavelength of lightwave, derives the frequency equation of Doppler effect of light with tow methods.
本文从光波波长的洛仑兹变换出发用两种方法导出了光的多普勒效应的频率公式。
3
To do that, the integral definition of vector magnetic potential and the Lorentz gauge is used to expand the integral equation of the PEEC model.