高中物理关于带电粒子在匀强磁场中的匀速圆周运动的习题中,有两类带电粒子比较特殊:第一类是在同一平面内沿某一方向发射的速率不同的同种带电粒子;第二类是在同一平面内,沿各个方向发射相同速率的同种带电粒子,为了讨论方便,我们把它们称之为两类粒子源问题. In high school physics, there are two types of charged particles in a uniform motion of a charged particle in a uniform magnetic field: the first type is a charged particle of the same kind that emits in a direction along the same plane in different directions; Classes emit the same type of charged particles in the same plane in the same direction. For the sake of discussion, we call them two types of particle source problems.