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A beam of photons of energy 5.0 eV is in...

A beam of photons of energy 5.0 eV is incident on a metal surface, whose work function is 3.0 eV. The metal remains isolated and the photoelectrons are being removed instantaneously after their emission. Although photoelectric emission akes places initially, but after some times it ceases. Explain it with reasons.

Answer

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Knowledge Check

  • The work function of a metal surface is 2.0 eV. Light of wavelength 5000 Å is incident on it:

    A
    the energy of each incident photon is 2.48 eV
    B
    the threshold wavelength for photoelectric effect is `6200 Å`
    C
    maximum kinetic energy of emitted photoelectron is 0.48 eV
    D
    stopping potential is 0.48 eV

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