在初中教学中,凸透镜成像特点一节既是教学的重点同时也是难点,更是考试的热点.很多学生遇到这类题目往往束手无策,归其原因一方面是由于凸透镜成像繁杂的规律很难记忆,另一方面繁杂的规律要应用起来难度也很大.在如何突破凸透镜成像难点的个问题不少文献做了一些探讨, In junior high school teaching, the convex lens imaging feature section is not only the focus of teaching is also difficult, but also the examination of the hot spots.Many students often do not have any solution to these problems, the reason is partly due to the complicated lens imaging difficult to remember, On the other hand, complicated rules are also very difficult to be applied.A lot of literature on how to break through the problems of convex lens imaging has been discussed,