The work fuknction of a material is 4 eV...

The work fuknction of a material is 4 eV. The longest wavelength of light that causes photoelectron emission from this substances is approximately -

540nm

400nm

310nm

220nm

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Work function of a metal is 4.0 eV. Find the maximum value of wavelength of a radiation that can emit photoelectrons from the metal.

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

A photoelectric source is illuminated successively by monochromatic light of wavelenth lamda and (lamda)/(2) . Calculate the work function of material of the source if the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case.

The work function for a certain metal is 4.2 eV. Will this metal give photoelectric emission for incident radiation of wavelenght 330 nm?

The work function of metals is in the range of 2 eV to 5 eV. Find which of the following wavelength of light cannot be used for photoelectric effect. (Consider, Planck's constant = 4 xx 10^(-15) eV.s , velocity of light = 3 xx 10^(8) m//s )

Statement I: Any light wave having frequency less than 4.8 xx 10^(14)Hz cannot emit photoelectrons from a metal surface having work function 2.0 eV Statement II: If the work function of a metal is W_(0) (in eV), then the maximum wavelength (in Å ) of the light capable of initiating photoelectric effect in the metal is given by lamda_("max") = (12400)/(W_(0))

Work function for monlybdenum is 4.2 eV. Determine the threshold wavelength of photoelectric effect for molybdenum.

Work function of a metal surface is 2eV. Maximum kinetic energy of photoelectrons emitted from the surface for incidence of light of wavelength 4140 Å is 1eV. What is the threshold wavelength of radiation for that surface?

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