如图所示平行主光轴的两束光线经过透镜后分别经过ab两点射出请画出光线的光路并确定透镜焦点f位置.——青夏教育精英家教�—— Template




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tomski如图所示平行主光轴的两束光线经过透镜后分别经过ab两点射出请画出光线的光路并确定透镜焦点f位置.——青夏教育精英家教�—— coloring