SOLVED:A device called a photocell detects light by letting it fall onto a metal and then measuring the current from the ejected electrons. You are designing a photocell to work with visible light and are considering the use of either aluminum (work function =4.3 eV ) or cesium (work function =2.1 eV ). a. Which one is a better choice? b. What is the lowest photon frequency that can be detected with your photocell? c. Where does this frequency fall in the electromagnetic spectrum?
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