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’96高考物理试题第七小题是一道考查凸透镜成像知识的题目。此题将能力考查寓于物理知识之中,重点考查了学生动态分析物理过程的思维能力,是一道不可多得的好题。下面结合不同的思维方式给出两种解法。题目:一焦距为f的凸透镜,主轴和水平的x轴重合,x轴上有一光点位于透镜的左侧,光点到透镜的距离大于f而小于2f。若将此透镜沿x轴向右平移2f的距离,则在此过程中,光点经透镜所成的像点将()。
The seventh question of the ’96 college entrance examination physics test is a question that examines the convex lens imaging knowledge. This question will be involved in the ability to examine the physical knowledge, focus on examining the student’s ability to dynamically analyze the physical process of thinking, is a rare good question. The following two solutions are given in combination with different ways of thinking. Title: A convex lens with a focal length f, where the principal axis coincides with the horizontal x-axis, a light spot on the x-axis is located on the left side of the lens, and the distance from the light spot to the lens is greater than f and less than 2f. If the lens is translated to the right in the x-axis by a distance of 2f, in the process, the spot will be () by the image point made by the lens.