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  1. A 20491 cm─1 laser line was used to excite oxygen molecules (made of 16O only) to obtain the rotational Raman spectrum. The resulting rotational Raman spectrum of oxygen molecule has the first Stokes line at 20479 cm─1.
    T he rotational constant (usually denoted as B) for the oxygen molecule is
    2. A.
    1.2 cm─1
    B.
    2.0 cm─1
    C.
    3.0 cm─1
    D.
    6.0 cm─1

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    Answer : Option A

    Explanation :

    -NA-

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