Matlab软件在迈克尔逊实验仪测空气折射率中的应用

The Application of Matlab Software for the Air Refractive Index Using the Michelson Experiment Instrument

通过压强变化时显示屏上干涉条纹出现或者消失的数量,迈克尔逊实验仪可以测定空气的折射率。实验中测量的物理量较多,人工处理数据比较繁琐,且容易出错,因此使用Matlab软件处理数据可以直接得到不同气压的空气的折射率,处理过程快捷精确。Matlab软件处理数据时,对实验数据进行了最小二乘法处理,可以得到空气折射率随气压变化的拟合直线。

Air refractive index at different pressure can be determined with the number change of interference fringes appearing or disappearing in the screen of the Michelson experiment, in which many physical parameters are measured. Also the data process by hands is trivial with high error probability. Therefore,the da-ta is processed with Matlab software. The air refractive index of different pressure can be obtained quickly and precisely with low percentage difference. Particularly, the experiment data is processed with least-square method so that the change curve of air refractive index at different pressure can be obtained.