摘要
光电效应实验中用拐点法确定截止电压时,使用传统方法处理数据后得到的伏安特性曲线较粗糙,会导致误差偏大。而使用数学软件MATLAB处理所得数据,可拟合出光滑的曲线,从而使得误差大大减小,最终得到的普朗克常数的百分差可控制在0.5%内。此法简单可操作性强,易在学生中推广。
In the photoelectric effect experiment,when using the inflection point method to get the cut-off voltage data,if the traditional method is used to process the data,the obtained volt-ampere characteristic curve is relatively rough,which will result in a large error.However,using mathematic software MATLAB to process the obtained data,the smooth curve can be fitted,so that the error is greatly reduced,and the percentage difference of Planck＇s constant obtained can be controlled within ±0.5%.This method is simple and practical,suitable for promotion among students.
作者
张皓然
李金玉
ZHANG Hao-ran;LI Jin-yu(Zhejiang Ocean University,Zhejiang Zhoushan 316000)
出处
《大学物理实验》
2018年第3期109-111,共3页
Physical Experiment of College
