• 2022-06-09
    一束具有两种波长λ1和λ2的平行光垂直照射到一衍射光栅上,测得波长λ1的第三级主极大衍射角和λ2的第四级主极大衍射角均为30°。已知λ1 = 5600 Å,试问光栅常数a+b及波长λ2
    A: [img=113x24]180344826dd1982.png[/img],3800 Å
    B: [img=113x24]1803448275b281e.png[/img],4200 Å
    C: [img=113x24]180344827e91a89.png[/img],4200 Å
    D: [img=113x24]1803448286a8398.png[/img],3800 Å
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