测量棱镜色散规律的方法改进

Improvennent of measuring dispersion of prism

对目前实验教科书中研究棱镜色散规律常用的方法具有数据多、用时长及技巧性强的不足,提出了一种比较简洁直观的测量棱镜折射率的方法,即直接测量光线的入射角和不同频率光的出射角,用折射定律即可算得各色光的折射率.通过与传统的实验方法相比较,结果表明在准确度上二者是一致的.最后用Matlab拟合出棱镜的色散曲线及公式.

The disadvantages of the method commonly used to study the prism dispersion, such as too many data to process, time consuming, and too difficult to master, are put forward. A simple and intuitive method to measure the refractive index of prism is proposed. The angle of incidence and emergence are directly measured and used to calculate the refractive index with law of refraction. The results are in agreement with the traditional method, the accuracy is of the same order. Finally, Matlab is used to fit the dispersion curve.