Light of wavelength 500 nm is incident upon a metal, causing electrons to be ejected. The stopping voltage of the ejected photoelectrons is measured to be 0.5 V. What is the work function of the metal? (a) 0.500 eV (b) 1.98 eV (c) 2.98 eV (d) 0.00 eV () 2.48 eV If the intensity of the incident light is doubled, which of the following statements is necessarily true? The "current\" refers to the number of electrons per second coming off the metal. (@) No photoelectrons are observed (b) The stopping voltage decreases (c) The current decreases (d) The stopping voltage increases (e) The current increases L)