【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
I.某同学在做“用双缝干涉测光的波长”实验时,第一次分划板中心刻度线对齐A条纹中心时,游标卡尺的示数如图(3)所示;第二次分划板中心刻度线对齐B条纹中心时,游标卡尺的示数如图(4)所示.已知双缝间距为0.5mm,从双缝到屏的距离为lm,则图(3)中游标卡尺的示数为______mm,图(4)游标卡尺的示数为______mm.实验时测量多条干涉条纹宽度的目的是______,所测光波的波长为______m(保留两位有效数字).Ⅱ.如图(5)为分别用红光和紫光进行双缝干涉实验的装置及条纹示意图,a为中央亮条纹,b为次级亮条纹.则乙图是用______光实验产生的条纹.
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