光电效应法测量普朗克常数
Measurement of Planck Constant by Photoelectric Effect Method
杨艳霞1
作者信息
- 1. 山西大同大学物理与电子科学学院,山西 大同 037009
- 折叠
摘要
在光电效应测量普朗克常数实验中,采用零电流法探究光源预热时间不同、光源与光电管距离不同、电压调节方向不同的情况对普朗克常数的影响.利用Origin软件对入射光频率v与截止电压Us的关系进行线性拟合,进而计算出普朗克常数.分析得到:光源预热25 min,光源与光电管距离为0.22 m,电压正向调节时为测量普朗克常数的最佳实验条件.
Abstract
In the experiment to measure Planck Constant by Photoelectric Effect,the zero-current method was used to investi-gate the effect of different preheating times of the light source,different distances between the light source and the photocell,and dif-ferent directions of voltage regulation on Planck Constant.The relationship between the incident light frequency v and the cut-off voltage Us was linearly fitted using Origin software,and Planck Constant was calculated.The analysis showed that the best experi-mental conditions for measuring Planck Constant were a preheating time of 25 minutes,a distance of 0.22 meters between the light source and the phototube,and positive voltage regulation.
关键词
普朗克常数/光电效应/零电流法/截止电压Key words
Planck Constant/Photoelectric Effect/the zero-current method/cut-off voltage引用本文复制引用
出版年
2024
NETL
NSTL
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