凸透镜成像规律及其应用是光学部分的重点内容 ,这部分内容是中考的必考内容 ,为了提高同学们的学习效率和素质 ,结合中考试题就这部分知识分析如下。1　已知凸透镜的焦距和物距 ,判断物体通过凸透镜的成像情况。例 1　 (河北 )发光物P从凸透镜 60cm的地方沿主轴向透镜方向以v Convex lens imaging law and its application is the key part of the optical part. This part is the content of the examination. To improve the students’ learning efficiency and quality, this part of the knowledge is analyzed in conjunction with the examination questions. 1 The focal length and object distance of the convex lens are known to determine the imaging condition of the object through the convex lens. Example 1 (Hebei) Illuminant P from the convex lens 60cm along the main axial lens direction v