When light of wavelength 150 nm falls on a potassium surface, electrons having a maximum kinetic energy of 6.04 eV are emitted. Find values for the following. (a) the work function of potassium eV (b) the cutoff wavelength nm (c) the frequency corresponding to the cutoff wavelength Hz

Light of wavelength 340 nm, 600 nm and 680 nm is incident on a metal. Electrons are not emitted from the metal, which of the following is the most likely scenario.     The energy of the photon for 600 nm light corresponds to the work function of the material.     The energy of the photon for 680 nm light corresponds to the work function of the material.     The work function is less than any of these photon energies.     The work function is more than any of these photon energies.     The energy of the photon for 340 nm light corresponds to the work function of the material.

A light source of wavelength λ illuminates a metal and ejects photo electrons with a maximum kinetic energy of 0.67 eV. A second light source with half the wavelength of the first ejects photoelectrons with a maximum kinetic energy of 3.3 eV. What is the work function of the metal? Answer in units of eV.

Violet light of wavelength 360 nm ejects electrons with a maximum kinetic energy of 0.89 eV from a certain metal. What is the work function of electrons to this metal, in electron volts?