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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
【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%.
【Abstract】 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;
【Key words】 difference of light path; index of refraction; digital phasementer; Lissajou figure; method of least squares;
【Key words】 difference of light path; index of refraction; digital phasementer; Lissajou figure; method of least squares;
- 【文献出处】 大学物理 ,College Physics , 编辑部邮箱 ,2004年10期
- 【分类号】TH823
- 【被引频次】12
- 【下载频次】442