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A wavelength of 135 nm shines on a sample of unknown metal. A photocurrent is detected with
a stopping potential with magnitude 4.5 V. Identify from the table which metal it is and whether 350
nm light would successfully produce a photocurrent.
Сopper
4.7 eV
Gold
5.1 eV
Iron
4.5 eV
Lead
4.14 ev
Magnesium
3.68 eV

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