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JEE Main & Advanced Physics Atomic Physics Question Bank Atomic Structure

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    The wavelength of light emitted from second orbit to first orbits in a hydrogen atom is                  [Pb. PMT 2002]

    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 :

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


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