AIIMS AIIMS Solved Paper-2010

  • question_answer
    In a photocell, with exciting wavelength \[\frac{5}{6}\], the faster electron has speed v. If the exciting wavelength is changed to 3\[\frac{6}{7}\],/4, the speed of the fastest electron will be

    A)  \[\frac{1}{86400}{{/}^{0}}C\]                     

    B)  \[\frac{1}{43200}{{/}^{0}}C\]

    C)  less than v \[\frac{1}{44400}{{/}^{0}}C\]

    D)  greater than v \[\frac{1}{28800}{{/}^{0}}C\]

    Correct Answer: B

    Solution :

    According to Emsteins photoelectric equation \[-\frac{1}{2}\] and    \[\frac{2}{5}\] These expression show that, \[\frac{3}{5}\] \[\frac{3}{7}\]  \[\frac{3}{4}\] \[\frac{R}{5}\]   \[\frac{4}{5}\]


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