凸透镜成像规律的学习一般是通过实验得出相应规律的.有不少同学对这一规律的理解有一定的难度,大部分同学以背的方式强记住了成像规律,时间长了容易遗忘.其实只要同学们理解了凸透镜成像的实质是光经过凸透镜折射后,折射光线正向(反向)相交而形成的,那么通过从物体的某一点(A)发出的两条特殊光线的光路图,就可以很容易找到这一点经凸透镜所成的像 Convex lens imaging law is generally learned through the experiment of the corresponding laws.Many students have a certain degree of difficulty in the understanding of this law, most of the students to remember the strong back imaging method, a long time easy to forget. In fact, as long as students understand the essence of convex lens imaging is the light through the convex lens refraction, the refraction of light is the positive (reverse) intersection formed by the object from a point (A) issued two special light path, It can be very easy to find this point by the lens made of like