一种基于几何光学原理的液体扩散系数测量装置

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摘  要：文章介绍了一种自行搭建的实验系统，自制了亚克力方形容器样品池，用于开展溶液的扩散系数测量工作。该装置基于几何光学原理，使用阿贝折射计精确测量液体溶液的折射率，依据描述扩散规律的菲克定律，对不同液体介质在不同浓度下的扩散系数进行测量，得出了扩散系数与浓度呈负相关的结论。

关键词：菲克定律;扩散系数;折射率

中图分类号：O435        文献标志码：A          文章编号：2095-2945（2022）02-0049-04

Abstract： An experiment system was constructed for measuring the diffusion coefficients of solutions. The system is based on the geometrical optics principle. The sample pool is a self-made transparent Acrylic square container. The refractive indices of solutions， which is related to the concentrations， are accurately measured by the Abbe refractometer. According to Fick's law， diffusion coefficients of different solutions with different concentrations have been measured. The results showed that the diffusion coefficients were negatively correlated with the concentrations.

Keywords： Fick's law; diffusion coefficient; refractive index

19世紀，人们已知道室温下空气分子的平均速率约为4×102m/s，声速约3×102m/s。（剩余3458字）