Discuss When m has been moved A/2 one -half a wavelength optical path difference is changed by one 2 wavelength 当视场中看到N个 M 条纹移过时,M E 平移的距离为: d= N 2 ①测量微小长度的变化; 迈克尔逊干涉仪的应用:②测量光波长。E S M1 M2 G1 G2 L When M2 has been moved one –half a wavelength, optical path difference is changed by one wavelength. Discuss：  / 2 当视场中看到N个 条纹移过时，M2 平移的距离为： 2  d = N 迈克尔逊干涉仪的应用： 测量微小长度的变化； 测量光波长