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JEE Main & Advanced Physics Atomic Physics Question Bank Topic Test - Atomic Physics

  • question_answer
    Hydrogen atoms are excited from ground state of the principal quantum number 4. Then the number of spectral lines observed will be  

    A) 3

    B) 6

    C) 5

    D) 2

    Correct Answer: B

    Solution :

    [b] Number of spectral lines \[{{N}_{E}}=\frac{n(n-1)}{2}=\frac{4(4-1)}{2}=6\]
     


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