基于临界全反射的透明液体浓度测量  

Measurement of Clear Liquid ConcentrationBased on Critical Total Reflection

作　　者：苏天泽 谢李可 周鑫祎 李想 周梓豪 汪海 金三梅[1] SU Tianze;XIE Like;ZHOU Xinwei;LI Xiang;ZHOU Zihao;WANG Hai;JIN Sanmei(School of Mathematics and Physics,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质大学数学与物理学院,湖北武汉430074

出　　处：《大学物理实验》2025年第1期30-33,共4页Physical Experiment of College

基　　金：湖北省科研项目(20231250144);教育部协同育人项目(220603584244023);中国地质大学(武汉)实验技术研究项目(SJ-202311,SJ-202414)。

摘　　要：基于全反射原理,本研究开发了一种创新的液体浓度测量方法。通过设计的容器承载待测溶液,并借助手机录制光线在液体表面发生全反射的过程,我们准确地测量了全反射的临界角。通过临界角和相关方程,进而推导出透明液体的折射率和浓度值。本实验不仅采用了直观的光学方法,还结合了手机软件的应用,从而有效降低了测量误差,减少了装置成本,操作方便。此外,这种实验设计思路的拓宽,使得光学实验更加贴近日常生活,易于推广和普及。Based on the principle of total reflection,this study introduces an inventive method for measuring liquid concentration.By employing a specifically designed container to hold the test solution and utilizing a mobile phone to capture the total reflection of light on the liquid′s surface,the critical angle was precisely obtained.Through this critical angle and relevant equations,we derived the refractive index and concentration value of the transparent liquid.This experiment not only employs intuitive optical techniques but also integrates mobile software,significantly reducing measurement errors,equipment costs and facilitates operation.Furthermore,the broadened scope of this experimental design approach brings optical experiments closer to daily life,facilitating their widespread adoption and promotion.

关 键 词：液体浓度 全反射临界角 液体折射率 角度测量 

分 类 号：O435.1[机械工程—光学工程]