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实验室如何测凸透镜的焦距

更新时间: 2020-10-11 00:00:00     

用具:是光源、光屏、凸透镜。步骤:1.用光源照射凸透镜,射到光屏上。2.调整距离,直到光屏上的光斑成点。3.测量光点到凸透镜中心的距离。测量出来的距离就是焦距。

关键词: 实验室 如何 凸透镜 焦距

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