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JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank X Rays

  • question_answer
    The wavelength \[\lambda \] of the \[{{K}_{\alpha }}\] line of characteristic X-ray spectra varies with atomic number approximatel [MP PMT 1987]

    A)            \[\lambda \propto Z\]     

    B)            \[\lambda \propto \sqrt{Z}\]

    C)            \[\lambda \propto \frac{1}{{{Z}^{2}}}\]                       

    D)            \[\lambda \propto \frac{1}{\sqrt{Z}}\]

    Correct Answer: C

    Solution :

               According to Mosley's law \[\nu =a\,{{(Z-b)}^{2}}\] and \[\nu \propto \frac{1}{\lambda }\]


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