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[" The energy of emitted photoelectrons ...

[" The energy of emitted photoelectrons from a metal "],[" is "0.9eV" .The work function of the metal is "],[2.2eV" .Then the energy of the incident photon is "],[[" 1) "0.9eV," 2) "2.2eV," 3) "4.4eV," 4) "3.1eV]]

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