迈克尔逊干涉仪实验中最佳间隔条纹个数的探讨

用迈克尔逊干涉仪可以测量激光的波长,读取的干涉条纹个数较多时容易引起学生视力的疲劳。因此,本文测量了多组不同的间隔条纹个数时氦氖激光的波长,进而确定它们与波长理论值之间的误差大小,通过比较不同间隔条纹个数时百分差和相对不确定度的大小,最终确定最佳的间隔条纹个数。

Discussion on the Optimal Number of Spaced Fringes in the Experiment of Michelson Interferometer

Using a Michelson interferometer,the laser wavelength can be measured.When the number of meas-ured interference fringes increases, the students ’ eyes become more fatigued. Therefore, He-Ne laser wavelengths are measured under different sets of spaced fringes number and then the measured wavelengths are compared with the theoretical values of the wavelength.Ultimately the optimal number of spaced fringes is de-termined by comparing percent differences and relative uncertainty degrees of different spaced fringes numbers.