摘要
落球法测量液体黏滞系数是大学物理实验中一项基本的实验,得到了人们的广泛关注。实验中一些测量数据的不确定性使得实验结果存在一定误差,例如,小球下落的初速是否为零,下落时间的测量是否精确,如何保证下落准直度等。基于实验中可能出现的误差分析及现有的激光技术,我们对落球法测量液体黏滞系数的实验仪器做了一些改进,大大降低了实验的操作难度,结果表明,改进后的实验仪器能够有效的减小实验误差,为落球法精确测量液体黏滞系数提供了一种可行性方案。
Using the falling-sphere method to measure the liquid viscosity coefficient is a basic experiment in college physics,which has attracted many attentions.The uncertainty of some measurement data in the experiment always exists,such as whether the initial velocity of the ball is zero,whether the measurement of the falling time is accurate,how to ensure the falling collimation,etc.,leading to some errors of the experimental results.Based on the possible error analysis in the experiment and the existing laser technology,we have made some improvements to the experimental instrument for measuring the liquid viscosity coefficient by the fallingsphere method,which greatly reduces the operation difficulty of the experiment.The results show that the improved experimental instrument can effectively reduce the experimental error and provide a feasible scheme for the accurate measurement of the liquid viscosity coefficient by the falling-sphere method.
作者
左学勤
王章银
ZUO Xueqin;WANG Zhangyin(School of Physics and Optoelectronics Engineering,Anhui University,Hefei 230601,China)
出处
《大学物理实验》
2022年第2期64-68,共5页
Physical Experiment of College
基金
安徽省高等学校省级质量工程项目(2020jyxm402)
关键词
黏滞系数
落球法
激光准直
示波器
viscosity coefficient
falling-sphere method
laser collimation
oscilloscope
