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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

  • question_answer
    The wavelength of yellow line of sodium is 5896 Å. Its wave number will be                                         [MP PET 2001]

    A)            50883 × 1010 per second

    B)            16961 per cm

    C)            17581 per cm

    D)            50883 per cm

    Correct Answer: B

    Solution :

               Wave number \[\bar{\nu }=\frac{1}{\lambda }\]\[=\frac{1}{5896\times {{10}^{-8}}}=16961\]per cm


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