则此凸透镜的焦距是

问题描述:

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1个回答 分类:物理 2012-11-25

问题解答:

我来补答
解题思路: (1)平行于凸透镜主光轴的光线经凸透镜折射后会聚于主光轴上一点,这个点就是焦点,透镜光心到焦点的距离就是焦距; (2)平面镜成像的特点是:虚像,物像等大、物像等距、物像连线与镜面垂直.
解题过程:
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最终答案:略
 
 
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