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作 者:施家凯 沈雅琪 马松山[1] 束传存 SHI Jiakai;SHEN Yaqi;MA Songshan;SHU Chuancun(School of Physics and Electronic Science,Central South University,Changsha 410083,China)
机构地区:[1]中南大学物理与电子学院,湖南长沙410083
出 处:《物理实验》2023年第4期44-48,共5页Physics Experimentation
基 金:湖南省普通高等学校教学改革研究重点项目(No.HNJG-2021-0015);中南大学教育教学改革研究项目(No.2020jy075);中南大学大学生创新训练项目(No.202321078)。
摘 要:利用红/绿激光笔、手机、水槽等简单器材,搭建了光度计模拟实验装置.基于Phyphox软件,利用手机的光敏传感器测量透射光的光强,获得溶液层的吸光度随溶液浓度和厚度的变化关系.结果表明:溶液层的吸光度与溶液浓度及厚度成正比,验证了朗伯-比尔定律.以Fe_(2)(SO_(4))3溶液和KCr(SO_(4))_(2)溶液为例,测量了含有2种溶质的混合溶液各溶质的浓度.A self-designed experimental instrument was set up using some simple devices,such as red and green laser pointers,mobile phone,sink,and so on.Based on the Phyphox software of mobile phone,the light intensity sensor of mobile phone was used to measure the light intensity of transmitted light.It was shown that the absorbance of the solution layer varied with the concentration and thickness of the solution.The results showed that the absorbance of the solution was proportional to the concentration and thickness of the solution,which verified Lambert-Beer law.Taking Fe_(2)(SO_(4))3 and KCr(SO_(4))_(2)solutions as the examples,the concentration of each solute in the mixed solution containing two solutes was measured.
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