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凸透镜成像问题既是初中物理的重点,也是各地中考的热点.对于凸透镜成像问题,若能善于探究,找出规律,则可达到快速判断,准确求解的目的,收到事半功倍的效果.一、物距u、像距v大小关系与像的大小变化规律当物体经凸透镜成实像,亦即当u>f时:(1)若v>u,则像必大于物,即成放大的实像;(2)若vu;(2)若像小于
The problem of convex lens imaging is not only the focus of junior middle school physics, but also the hot spot of the examinations in various places.If the problem of convex lens imaging is good at exploring and finding out the law, it can achieve the purpose of rapid judgment and accurate solution and get the multiplier effect. u, like the distance from the size of v and the size of the image changes when the object through the lens as a real image, that is, when u> f: (1) If v> u, then like the greater than the object, If v u; (2)