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1. The work function of a certain metal is φ = 2.25 eV. Determine the minimum...

1. The work function of a certain metal is φ = 2.25 eV. Determine the minimum frequency of light f0 for which photoelectrons are emitted from the metal. (Planck's constant is: h = 4.1357×10-15 eVs.)

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2. Determine the corresponding wavelength of light. (Possibly useful constant: hc = 1240 eVnm.)

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3. Calculate the kinetic energy of the emitted electrons if the frequency of the photons is doubled to 2f0.

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