A. Electrons are ejected from a metal surface with energies ranging up to 0.5eV when light with a wavelength of 546 nm is used. What is the work function of the metal in units of eV?

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B. What is the wavelength (in nm) of a photon with energy E = 2.07 eV?

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C. A gamma ray photon has an energy of 1.72 GeV. (1 GeV = 10⁹ eV.) What is the wavelength of the gamma ray in fm? (1 fm = 10^-15 m)?

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