光电效应实验中光阑大小对实验结果影响的探讨  

Discussion of Effect of Aperture Size on experimental Results in Photoelectric Effect experiment

作　　者：吕佩伟[1] 施洋[1] 马宋设[1] 马靖[1] 

机构地区：[1]福州大学,福州福建350116

出　　处：《大学物理实验》2014年第3期68-70,共3页Physical Experiment of College

基　　金：福州大学科技发展基金(2013-XY-30)

摘　　要：在光电效应测量普朗克常数的实验中,采用零电流法测量遏止电压大小。用Origin软件对测量的数据进行线性拟合,可得到遏止电压与光子频率的关系曲线的斜率,从而能够更加准确的计算出普朗克常数的值。实验结果表明,随着光阑大小的增大,测量结果的相对误差越小,所得到的普朗克常数越精确。We use zero current method to measure the cut-off voltage in the photoelectric effect experiment of measuring the Planck constant. Based on the data fitting with Origin software, we can get the slope of cut-off voltage and frequency of photon. Then the Planck constant can be obtained more accurate. The experimental resuits show that the relative error of results is smaller, and the Planck constant is more accurately along with the increase of the size of aperture.

关 键 词：光电效应 普朗克常数 光阑大小 零电流法 

分 类 号：O4-39[理学—物理]