In the calculation of wave number of an electronic transition using Rydberg's equation, sum of n1 and n2 is maximum for

  1. A

    First line of Pfund series

  2. B

    Second line of Brackett series

  3. C

    Third line of Lyman series

  4. D

    Fourth line of Paschen series

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    Solution:

    ν-=1λ=RH 1n12-1n22 ; (1) n1+n2=5+6 (2) n1+n2=4+6 (3) n1+n2=1+4 (4) n1+n2=3+7 

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