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测量凸透镜的焦距是研究凸透镜成像规律的基础.无论是凸透镜对光的会聚作用,还是凸透镜的成像规律,都跟凸透镜的焦距有关.并且不同的凸透镜,焦距一般不同;同一个凸透镜,焦距一般不变.焦距是凸透镜本身的性质.那么,如何测量凸透镜的焦距呢?重温凸透镜的几个术语我们先来了解几个关于凸透镜的术语:(1)光心(O)——凸透镜的中心.(2)主光轴——通过光心且垂直于透镜表面的直线称为主光
Measuring the focal length of a convex lens is the basis for the study of the imaging law of a convex lens.No matter the converging effect of the convex lens on the light or the imaging law of the convex lens are related to the focal length of the convex lens and different convex lenses generally have different focal lengths; So, how to measure the focal length of the convex lens? Several terms to review the convex lens Let us first understand a few terms on the convex lens: (1) optical center (O) - the center of the convex lens. (2) The main optical axis - the main light passing through the optical center and perpendicular to the lens surface