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3. (2 marks) A light source of wavelength A illuminates a metal and ejects photoelectrons with a maximum kinetic energy of 1.00 eV. A second

3. (2 marks) A light source of wavelength A illuminates a metal and ejects photoelectrons with a maximum kinetic energy of 1.00 eV. A second light source with half the wavelength of the first ejects photoelectrons with a maximum kinetic energy of 4.00 eV. What is the work function of the metal

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