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When a photon of wavelength 3000 A is incident on a metal surface an electron...

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When a photon of wavelength 3000 A is incident on a metal surface an electron of energy 0 5 eV is emitte If a photon of wavelength of 2000 A is incident on the metal surface then the energy of emitted electron w be 1 0 5 eV 2 More than 0 5 eV 3 Less than 0 5 eV 4 None of the above

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