基础实验中光速和介质折射率测量方法的研究  

Study on the measuring method of light velocity and refractive index in the fundamental experiment

作　　者：伍雁雄[1] 张姝[1] 赵璐冰[1] 徐璐[1] 夏顺保[2] 高立模[2] 

机构地区：[1]南开大学物理科学学院2000级基地班 [2]南开大学物理科学学院

出　　处：《大学物理》2004年第10期56-58,共3页College Physics

摘　　要：采用一种新型光速测定仪测量光速和介质折射率,对测量方法进行了研究和改进,分析了测量误差的来源.在此基础上,采用精密数字相位计代替示波器测量相位,设计了新的测量方案,并采用最小二乘法进行线性拟合,从而提高了测量精度,其精度达到±0.1%.A new velocity apparatus is reported and its measuring method of light velocity and refractive index is elaborated, the sources of error are analyzed. Digital phasementer is adopted to measure the phase instead of oscillograph, and some new measuring methods are designed, the method of least squares is used to make line fitting, which enhance the measuring precision, the precision arrives to ±1%.

关 键 词：光程差 折射率 数字相位计 李萨如图形 最小二乘法 

分 类 号：O443[理学—电磁学]