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

  • question_answer
    The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is

    A) \[1.215\times {{10}^{-7}}m\]

    B) \[1.215\times {{10}^{-5}}m\]

    C) \[1.215\times {{10}^{-4}}m\]

    D) \[1.215\times {{10}^{-3}}m\]

    Correct Answer: A

    Solution :

    [a] Energy radiated \[E=10.2\,eV=10.2\times 1.6\times {{10}^{-19}}J\]
    \[\Rightarrow \]\[E=\frac{hc}{\lambda }\] Þ \[\lambda =1.215\times {{10}^{-7}}m\]


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