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JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Numerical Value Type Questions - Dual Nature of Radiation and Matter

  • question_answer
    Surface of certain metal is first illuminated with light of wavelength \[{{\lambda }_{1}}=350nm\] and then, by light of wavelength \[{{\lambda }_{2}}=540nm.\] It is found that the maximum speed of the photo electrons in the two cases differ by a factor of (2) The work function of the metal (in eV) is (Energy of photon\[=\frac{1240}{\lambda (in\,\,nm)}eV\])

    Answer:

    1.8


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