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EMR – Particle ModelPhotoelectric EffectIn your own words, what is a Black Body? How does it relate to incoming EMR?Maxwell Planck hypothesized that EMR could not solely be considered a wave and could come in small bundles thus being ________________. (utqazndie) rearrange the letters to get the answer.Planck determined that multiple bundles of EMR could have an energy related to the equation E=nhf, where n is the number of bundles, h is Planck’s constant in eVs or Js, and f is the frequency of the EMR. Individual bundle energies could be determined by E=hf. What are both of Planck’s constants?Find the Energy of one EMR particle with a frequency of 1.25 x 1016Hz. Solve in eV.Find the energy in Joules of Red light with a wavelength of 725 nm.Einstein, who worked closely with Planck, called these “particles” of EMR ______________.Since all EMR travels the speed of light in a vacuum, convert a radio wave with 101.3 MHz into wavelength.How does the photoelectric effect support the particle model of EMR and not the wave model?What is work function?What is threshold frequency? If the 1.2 eV is required to free an electron from a metal, what is the minimum threshold frequency to free the electrons?Aluminium and calcium have work functions of 4.28 eV and 2.87 eV respectively. Which metal required a higher wavelength to produce photoelectrons? What is that wavelength?An electron released in the photoelectric effect is called a ________________________What fundamental physics principle is the photoelectric equation based upon? Write the equation in terms of energy and in terms of the equations for energies (ex: E=hf or hc/λ)In the photoelectric effect, 1 photon of EMR incident on a metal, so long as it has enough energy, will free an electron from the metal and transfer the remaining energy to the kinetic energy of the electron. Find the kinetic energy in eV for and electron when a photon with wavelength of 120 nm is incident on a metal with a work function of 4.22eVA metal with a work function of 3.48eV has unknown EMR incident on it, producing photoelectrons with a velocity of 3.50x105m/s. What was the frequency for the incoming EMR?A metal with a threshold wavelength of 196nm has EMR with a wavelength of 141nm incident on it. What is the maximum velocity of the ejected photoelectrons?In a photoelectric experiment using yellow light no photoelectrons are produced. List three changes to the experiment to increase the chance of releasing a photoelectron.Incident EMR with 9.58eV of energy releases a photoelectron from surface with a threshold frequency of 1.11 x 1015Hz. What is the maximum stopping voltage of the electrons?Use the following graph to answer the next questionsWhat is the work function of the material?What is the threshold frequency of the material?From the graph determine Planck’s constant. ................
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