Question: A metal having a work function of 2 . 8 eV is illuminated with monochromatic light whose photon energy is 3 . 9 eV .

A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (1 eV =1.6010-19 J)

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