JEE Main & Advanced Physics Atomic Physics JEE PYQ-Atomic Physics

  • question_answer
    A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. It will emit:              [JEE ONLINE 25-04-2013]

    A) 2 lines in the Lyman series and I line in the Balmar series

    B)             3 lines in the Lyman series

    C)             1 line in the Lyman series and 2 lines in the balmar series

    D)             3 lines in the balmer series

    Correct Answer: A

    Solution :

    [a]
     
    (where Rydberg constant, )
    or
    Solving we get Spectral lines
    Total number of spectral lines = 3                                          
    Two lines in Lyman series for and  and one in Balmer series for
               


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