In a particular photoelectric effect experiment, photons with an energy of 4.50 eV are incident on a metal surface, producing photoelectrons with a maximum kinetic energy of 2.40 eV. (a) What is the work function of the metal? eV (b) If the photon energy is adjusted to 6.80 eV, what will be the maximum kinetic energy of the photoelectrons? eV (c) What is the wavelength, in nanometers, of a 6.80 eV photon? nm