【简答题】波长 λ =500nm的平行光,垂直地入射到一宽度为 a =1.0mm的单缝上,若在缝的后面有一焦距为 f =100cm的凸透镜,使光线聚焦于屏上,试问(1)从衍射图样的中心到第一级极小 mm(保留一个小数点); 从衍射图样的中心到; 第一级亮条纹的极大处的距离分别是 mm(保留2个小数点) (2)单缝衍射中央亮纹的线宽度 mm (保留一个小数点) 。
【简答题】Which of the following is the unique characteristic of online education that traditional education doesn’t have? A) There are lectures, but they won’t be in person. B) There are assignments, and you m...