1如图所示有两条光线分别从凸透镜的两倍焦距处射�透镜请在图中画出它们通过透镜后的光路2如图所示oo′为透镜的主光轴ab是物体 Template




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tomski1如图所示有两条光线分别从凸透镜的两倍焦距处射�透镜请在图中画出它们通过透镜后的光路2如图所示oo′为透镜的主光轴ab是物体 coloring