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【简答题】
单色可见光垂直入射缝宽0.5mm的单缝,缝后有一焦距为1m的凸透镜,在透镜焦平面上观察衍射图样,在距中央中心3mm处的P点为一暗纹中心,求 (1)入射可见光波长的可能值(可见光波长范围390nm~760nm) (2)不同的波长,P点对应第几级暗条纹,对应几个半波带 (3)对应以上可能值中波长最小的单色光,其形成的中央的线宽度
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