3 Newton' s rings牛顿环 equipment microscope A-a lens of radius of curvature r Ban accurately plane glass plate Interference pattern 半反 射镜 随着r的增加而变密!3.Newton's rings 牛顿环 A—a lens of radius of curvature R equipment： B—an accurately plane glass plate A B Interference pattern： 半反 射镜 microscope r 随着r的增加而变密！