You will become familiar with two effects/experiments important u l in this exercise development of quantum theory, the photoelectric effect and electron scattering from a metal crystal. these explanation of these experiments indicate the particle property of light and wave property of mater respectively. both of these effects have important modern applications of these properties have had large scientific and technological significance. electron microscopy is based on the same concepts as are needed to understand electron diffraction. the photoelectric effect has lead to photodiode and photo-sensing technologies and a revolution in the understanding of atoms and molecules through spectroscopic techniques 1) photoelectric effect. (14 points) when light is shown onto the negative plate of a capacitor the following observations are made. explain briefly how each observation is consistent with the idea that the incident light consists of particles with energy, hu, that undergo collision with electrons in the metal. a. no electrons are ejected regardless of the intensity of radiation, unless the frequency of the incident light exceeds a certain threshold such that the energy of the light quanta are at least as much as the work function of the metal, d, (2 points provided that the frequency of the incident radiation is high enough to eject electrons, the kinetic energy of the ejected electrons increases linearly with the frequency of the incident radiation but is independent of the intensity of the radiation. (2 points even at low intensities, electrons are ejected immediately if the frequency is above the threshold. (2 points) i. complete the table below. use na for not applicable in the right three columns if no electrons are ejected. (5 points) 1.000 ev = 96.49 kj mol-1. na-6.0214 × 1023 mol-1, c 2.9979× 108 m s-1, h 6.626×10-34js me-9.10938 x 10-31 k b. locity of wavelength any frequency,, of electrons energy of a, of incident of ejected work function, φ (ev) incident light (s-1) metal i ejected? ejected ejected (yes/no) electrons electrons electrons light (nm) (nm) 2.93 2.36 2.29 2.261 1.95 550.0 15,451시。 550.0 550.0 550.0 li na rb cs provided that the energy of incident photons is at least that of the work function, what happens to the number of electrons if the intensity of the light is decreased? (1 point) is there a periodic trend in work function, φ, displayed in the table above? if so, what is it? point) do you expect work function for a metal to be the same as or different from the 1st ionization energy of its gas phase atoms? explain briefly. (1 point) c. d. (1