14.如图所示焦距为10cm的凸透镜正对太阳光其下方的白纸上�现一光�此时光�到凸透镜的距离为12cm.若凸透镜远离白纸看到光�的大小 Template




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tomski14.如图所示焦距为10cm的凸透镜正对太阳光其下方的白纸上�现一光�此时光�到凸透镜的距离为12cm.若凸透镜远离白纸看到光�的大小 coloring