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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • question_answer
    Hydrogen atoms are excited from ground state of the principal quantum number 4. Then the number of spectral lines observed will be                                                      [CBSE PMT 1993]

    A)            3    

    B)            6

    C)            5    

    D)            2

    Correct Answer: B

    Solution :

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


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