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28 Sep 2019
Steel and iron are often 'galvanized', or coated with a thin layer of zinc metal to prevent corrosion (iron rusts but zinc does not). What is the longest wavelength of light (in nm) that can eject electrons from zinc metal? (i.e. assume the electron's kinetic energy is very close to zero.) The work function of zinc = 4.3 eV and 1 electron-volt (eV) = 1.602*10^-19 J.
Steel and iron are often 'galvanized', or coated with a thin layer of zinc metal to prevent corrosion (iron rusts but zinc does not). What is the longest wavelength of light (in nm) that can eject electrons from zinc metal? (i.e. assume the electron's kinetic energy is very close to zero.) The work function of zinc = 4.3 eV and 1 electron-volt (eV) = 1.602*10^-19 J.
Elin HesselLv2
28 Sep 2019
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