为了加深中学生对几何光学内容的理解;提高对几何光学规律的应用能力,教师在教学中应强调和补充如下内容: 1.人眼对外界物体感受的特点①通常我们所看到的物体上每一点所发出的光线(物体自身发光或反射光)都是发散光线,只有当这些光线进入人的眼睛,人才能看到物体。由于人眼的晶状体是一个可变焦距凸透镜,当物体发出的光线进入人眼后,本应生成倒立、缩小的实象,但是,由于生理机能的特点在大脑皮层反应出来的却 In order to deepen the understanding of middle school students on the contents of geometric optics; to improve the application of geometrical optics laws, teachers should emphasize and complement the following in teaching: 1. The characteristics of human eyes on external objects 1 usually we see on the object The light emitted by one point (the object itself emits or reflects light) is divergent. Only when these rays enter the eyes of a person can a person see the object. Since the lens of the human eye is a variable-convex convex lens, when the light emitted from the object enters the human eye, an inverted and reduced real image should be generated. However, due to the characteristics of the physiological function, it is reflected in the cerebral cortex.