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The threshold frequency of photoelectric...

The threshold frequency of photoelectric effect of a metal surface is `f_(0)`. The stopping potentials are `V_(0) and nV_(0)` when the frequencies of incident light are `2f_(0) and 4f_(0)`. What is the value of n ?

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The threshold frequency of photoelectric effect of a metal surface is f_(0) . The maximum velocities of the photoelectrons are v_(m) and 2v_(m) respectively when light waves of frequency 2f_(0) and nf_(0) are incident on the surface. What is the value of n?

The threshold frequency of photoelectric effect of a metal surface is f_(0) . The maximum kinetic energy of the photoelectron are E_("max") and 2E_("max") respectively, when light waves of frequencies 2f_(0) and nf_(0) are incident on the surface. What is the value of n?

Knowledge Check

  • The threshold frequency and the threshold wavelength of photoelectric emission from a metal surface are f_(0) and lamda_(0) . The frequency and the wavelength of incident light are f and lamda . Then

    A
    there will be no photoelectric effect if `f gt f_(0)`
    B
    there will be no photoelectric effect if `lamda gt lamda_(0)`
    C
    stopping potential `prop (f - f_(0))`
    D
    maximum kinetic energy of photoelectron `prop (lamda_(0) - lamda)`

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