Punjab Medical Punjab - MET Solved Paper-2011

  • question_answer Which of the following transition have minimum wavelength?

    A) \[{{n}_{4}}\to {{n}_{1}}\]                             

    B) \[{{n}_{2}}\to {{n}_{1}}\]

    C) \[{{n}_{4}}\to {{n}_{2}}\]                             

    D) \[{{n}_{3}}\to {{n}_{1}}\]

    Correct Answer: A

    Solution :

    \[E=\frac{hc}{\lambda }orE\propto \frac{1}{\lambda }\] Thus, a decrease in wavelength represents an increase in energy for \[{{n}_{4}}\to {{n}_{1}}\] transition. Greater the energy difference will follow lower wavelength.  Thus, for \[{{n}_{4}}\to {{n}_{1}}\] transition, wavelength would be minimum.

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