电子电荷 [16:02]

by Ailiss 7/14/2008 9:59:00 AM
    电荷的一个重要特性是它的“量子性”,即任何带电体的电荷只能是某一基本单位的整数倍。这个基本单位就是一个电子所带的电荷,叫做电子电荷,记做e。质子的电荷与电子电荷的绝对值相同,只不过质子的电荷是正的。近代物理从理论上预言有一种电量为±(1/3)e或±(2/3)e的基本粒子(称为层子或夸克)存在,并认为质子和中子等许多粒子都由层子组成,不过层子至今尚未直接为实验发现。

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11/20/2008 11:14:09 PM

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