【摘要】 N0和α是物理学和化学中的一个基本常数，它们在近代物理学中占有很重要的地位．笔者从理论和实验上进行了系统的讨论，阐明了其重要作用和测量方法．更多还原

【Abstract】 N0 and α,which are two basic constants in both physics and chem istry,play an important role in physics. The paper gives a systematic discussion in theory and experiment, showing their importace and the measuring methods.更多还原