光路可逆原理,无论光是发生反射还是折射都普遍遵守。若能正确地理解这一基本原理,对理解凸透镜成像规律及解决与此有关的一些复杂问题十分有用。在凸透镜成像规律中:(1)当物距u2f时,成倒立、缩小的实像,像距fv2f;(2)当物距fu2f时,成倒立、放大的实像,像距v2f。根据光路? The principle of reversibility of the optical path is universal, regardless of whether the light is reflected or refracted. If we can correctly understand this basic principle, it is very useful to understand the imaging law of convex lenses and solve some complex problems related to this. In the convex lens imaging law: (1) When the object distance u2f, into a real image of inverted, reduced, image distance fv2f; (2) When the object distance fu2f, into a real image of inverted, enlarged, image distance v2f. According to the light path?