When monochromatic light of an unknown wavelength falls on a sample of copper, a minimum potential of
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When monochromatic light of an unknown wavelength falls on a sample of copper, a minimum potential of 2.49 V is required to stop all of the ejected photoelectrons. (The work function for copper is 4.70 eV.)
(a)Determine the maximum kinetic energy (in eV) of the ejected photoelectrons. eV?
(b)Determine the maximum speed (in m/s) of the ejected photoelectrons. m/s?
(c)Determine the wavelength in nm of the incident light. nm?
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