用Mathematica实现光电效应实验的曲率法数据处理  

Data Processing with Curvature Method Based on Mathematica in Photoelectric Effect Experiment

作　　者：徐金瑛 鲁晓东[1] 

机构地区：[1]浙江海洋学院东海科技学院,浙江舟山316000

出　　处：《大学物理实验》2015年第6期94-97,共4页Physical Experiment of College

摘　　要：通过对光电管中光电流成分的分析,知其大小是随电压呈曲线变化的。由此提出用Mathematica软件来拟合光电流的伏安特性曲线,并以曲线中曲率最大的点作为遏止电压点,有效减小了由主观方法估计带来的不稳定因素,提高了实验结果的准确性。By analyzing the components of photocurrent in Phototube,it is said that the current changes in stage following with changing of its voltage. A method based on Mathematica is proposed to fit the volt-ampere characteristics curve of photocurrent,and to regard the point where the curvature goes to maximum as cut-off voltage. The method reduced the negative effect from subjective estimation,so the accuracy of experimental results is promoted.

关 键 词：光电效应 光电流 遏止电压 曲率法 

分 类 号：O4-39[理学—物理]