Glossary term: 电场
Description: 带电粒子通过电场力相互吸引或排斥——同性电荷相斥，异性电荷相吸。在物理学中，我们将一种电荷对其他电荷的作用分为两个步骤，这种做法已被证明是切实可行的：第一步，每个带电粒子都会在周围空间产生所谓的电场。第二步，作用在第二个粒子上的力由第二个粒子所在位置的电场方向和强度（“场矢量”）直接给出：将电场与第二个粒子的电荷值相乘，就得到了作用在第二个粒子上的力。作用在第一个粒子上的力的强度相同，但方向相反。
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