通过实验,我们知道像随着物体在凸透镜的主光轴上移动.那么,当物体从远处靠近凸透镜时,像朝哪个方向移动,谁跑得快呢?像的大小又如何变化呢?凸透镜对光有会聚作用首先需要准确掌握两个概念:焦距(焦点)、会聚.焦距是每个凸透镜最重要的参数,它反映凸透镜的折光能力.凸透镜越凸,焦距越小,凸透镜的折光能力越强,它对光的会聚作用越大,如图1:凸透镜越扁平,焦距越大,凸透镜的折光能力越弱,如图2.凸透镜对光有会聚作 Experimentally, we know that as objects move on the main optical axis of a lenticular lens, who moves faster as the object moves from a distance closer to a lenticular lens, in what direction? How does the image change in size? Focus on the convergence of light first need to accurately grasp the two concepts: focal length (focus), convergence. Focal length is the most important parameter for each convex lens, which reflects the refractive power of the convex lens convex lens the more convex the smaller the focal length of the refractive power of the convex lens Strong, its greater role in the convergence of light, as shown in Figure 1: The more flat the lens, the greater the focal length, the weaker the refractive power of the lens, as shown in Figure 2. Convex lens convergence of light