While conducting research into the design of a light sensor, scientists measure the kinetic energy of photoelectrons that have been ejected from an unknown metal surface. The metal is exposed to various frequencies of EMR and the stopping voltage is measured to obtain the kinetic energy of the photoelectrons. The following data is obtained. Incident EMR frequency x 104 Hz 6.0 7.0 8.0 9.0 10.0 Kinetic energy photoelectrons (eV) 0.38 0.80 1.20 1.63 2.04 a. Using the data above, plot a kinetic energy vs. frequency graph and use it to answer questions b-e. Electron Kinetic Energy Vs. Frequency of Incident EMR +2 1.8 116 1.4 1.2 +1 0.8+ kinetic energy (E eV 0,u- 0.2 0 -0.6 1.0 20 30 40 5.0 6.0 Threshold 7.0 8.0 9.0 10.0 frequency (1) x 1014 Hz b. According to your graph, what is the value of the threshold frequency the unknown metal? Label the threshold frequency on your graph. c. Determine the work function of the unknown metal. utanf While conducting research into the design of a light sensor, scientists measure the kinetic energy of photoelectrons that have been ejected from an unknown metal surface. The metal is exposed to various frequencies of EMR and the stopping voltage is measured to obtain the kinetic energy of the photoelectrons. The following data is obtained. Incident EMR frequency x 104 Hz 6.0 7.0 8.0 9.0 10.0 Kinetic energy photoelectrons (eV) 0.38 0.80 1.20 1.63 2.04 a. Using the data above, plot a kinetic energy vs. frequency graph and use it to answer questions b-e. Electron Kinetic Energy Vs. Frequency of Incident EMR +2 1.8 116 1.4 1.2 +1 0.8+ kinetic energy (E eV 0,u- 0.2 0 -0.6 1.0 20 30 40 5.0 6.0 Threshold 7.0 8.0 9.0 10.0 frequency (1) x 1014 Hz b. According to your graph, what is the value of the threshold frequency the unknown metal? Label the threshold frequency on your graph. c. Determine the work function of the unknown metal. utanf