21.如图8所示是照相机的原理图a’b’是ab的像请画出图中与入射光线对应的折射光线并确定凸透镜一侧焦点的位置用字母f表示——青夏 Template




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tomski21.如图8所示是照相机的原理图a’b’是ab的像请画出图中与入射光线对应的折射光线并确定凸透镜一侧焦点的位置用字母f表示——青夏 coloring