利用光电效应实验仪测量液体浓度

doi:10.14139/j.cnki.cn22-1228.2023.01.005

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摘要

一定波长的光透过液体时会有部分光强被液体吸收，不同浓度的液体对光强的吸收能力不一样。经液体吸收后剩余的光强依然会使光电管产生光电流。基于光电效应的实验原理，测量同一液体不同浓度时对应的光电流大小，绘制二者的定标曲线并通过计算机拟合二者的线性方程。即最终仅需通过光电效应实验仪测得液体挡光后光电流的大小即可计算液体对应的浓度。

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	冯宇
	王俊杰
	梁申
	吕宪魁
	郑永刚
	刘文广
	冯洁

关键词: 光电效应液体浓度光电流光电效应实验仪

Abstract:

When a certain wavelength of light passes through the liquid，some of the light intensity will be absorbed by the liquid，and the absorption ability of different concentrations of liquid to the light intensity will be different．The remaining light intensity after liquid absorption will still cause photocurrent to be generated in the phototube．Based on the experimental principle of photoelectric effect，the corresponding photocurrent of the same liquid at different concentrations was measured．The calibration curve of the two is drawn，and the linear equation of the two is fitted by computer．That is，the corresponding concentration of the liquid can be calculated only by measuring the photocurrent of the liquid after light blocking through the photoelectric effect tester．

Key words: photoelectric effect liquid concentration photocurrent photoelectric effect tester

出版日期: 2023-02-25 发布日期: 2023-02-25 整期出版日期: 2023-02-25

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引用本文:

冯宇, 王俊杰, 梁申, 吕宪魁 , 郑永刚, 刘文广, 冯洁. 利用光电效应实验仪测量液体浓度 [J]. 大学物理实验, 2023, 36(1): 20-22.
FENG Yu, WANG Junjie, LIANG Shen, LÜ Xiankui , ZHENG Yonggang, LIU Wenguang, FENG Jie. Measurement of Liquid Concentration by Photoelectric Effect Experimental Instrument . Physical Experiment of College, 2023, 36(1): 20-22.

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http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2023.01.005 或 http://dawushiyan.jlict.edu.cn/CN/Y2023/V36/I1/20

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