如图所示点光源s正对圆孔相距为a透过圆孔的光在后面的大屏上得到一个圆�.若在孔上嵌上一凸透镜则光屏上立刻出现一个清晰的亮点则该透镜的 Template




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tomski如图所示点光源s正对圆孔相距为a透过圆孔的光在后面的大屏上得到一个圆�.若在孔上嵌上一凸透镜则光屏上立刻出现一个清晰的亮点则该透镜的 coloring