Question

???. 111 89% 9:54 AM X Question Show your work. Include units and the appropriate number of sig figs in your answer 7. Selenium's work function is 5.90 eV a. What is the threshold wavelength for this metal? (5) threshold b. An incoming photon must have energy to liberate a photoelectron from this material.(1) i. More ii. Less ii. An equal What potential difference must be applied to stop the fastest photoelectrons emitted by a c. selenium surface receiving 185 nanometer light? (6) i. -0.820 v ii. -0.918 V iv. -2.09 v PHYC 252-Spring 2018 Page 8

Answer 1

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