高中物理教学大纲降低了几何光学中“利用透镜成像公式进行计算”部分的要求,所以对几何光学中“作图问题”部分的要求必然会相应提高.在作图问题中,“通过作图判断平面镜观察范围”的问题就成了较为棘手的问题.对于此类题型,大多数同学在解题时都感到无从下手.究其原因主要是:同学们对该知识掌握得不够透彻,没有能抓住解决问题的关键和方法. The syllabus of high school physics reduces the requirement of the “calculation using lens imaging formula” part in geometrical optics, so the requirement for the “mapping problem” part in geometrical optics will inevitably increase accordingly. In the drawing problem, “determine by drawing” The problem of “scope scope” has become a more difficult problem. For this type of problem, most students are unable to start when solving problems. The main reasons are: the students have not enough knowledge of the knowledge, can not Grasp the key and method to solve the problem.