Question: A metal has a work function of 2.3 eV. When light of frequency 5.6 x 104 Hz is incident on the metal, electrons are

A metal has a work function of 2.3 eV. When light of frequency 5.6 x 104 Hz is incident on the metal,

A metal has a work function of 2.3 eV. When light of frequency 5.6 x 104 Hz is incident on the metal, electrons are ejected with a maximum kinetic energy of 1.2 eV. (a) Calculate the threshold frequency of the metal. (b) Calculate the energy of the incident photons. (c) Calculate the minimum energy required to eject an electron from the metal. (d) Explain why the maximum kinetic energy of the ejected electrons is less than the energy of the incident photons. (e) The photoelectric effect can be used to determine the work function of a metal. Describe how this can be done.

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