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高中物理在讲授“粒子速度选择器”时,对不同速度带电粒子的运动轨迹,习惯地画成如图一所示.这是否正确呢?确是一个值得探讨的问题. 实际上,带电粒子在正交匀强电场和匀强磁场里的运动规律与其在正交重力场和匀强磁场里的运动规律是类同的,因此,笔者拟在拙作“带电粒子同时在重力场和磁场里运动初探”(载《天津教育》1985年第3期)的基础上(以下简称“初探”),对图一所示的问题进一步探讨如下.
When high school physics teaches “particle speed selectors,” the trajectories of charged particles of different speeds are customarily drawn as shown in Figure 1. Is this correct? It is indeed a question worth exploring. In fact, charged particles are The motion law in the orthogonal uniform electric field and the uniform magnetic field is similar to that in the orthogonal gravity field and the uniform magnetic field. Therefore, the author proposes to explore the role of charged particles in both the gravitational field and the magnetic field. Based on the “Tianjin Education” No. 3 of 1985 (hereinafter referred to as the “Exploration”), the problems shown in Figure 1 are further discussed below.