1实验室常用如图所示的实验测量焦距.此凸透镜的焦距为1111cm.2知道了该凸透镜的焦距之后将蜡烛放在距离凸透镜20厘米的位置在光 Template




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tomski1实验室常用如图所示的实验测量焦距.此凸透镜的焦距为1111cm.2知道了该凸透镜的焦距之后将蜡烛放在距离凸透镜20厘米的位置在光 coloring