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In a photoelectric experiment on the metal copper, the following values of the stopping potential V0 were obtained at different wavelengths (lambda) of the incident ultraviolet light.
a. Use a graphical method to determine a value for the work function of copper.
b. Find the maximum velocity of an ejected electron if the copper surface is illuminated by radiation with a wavelength of 122nm, the longest wavelength line of the Lyman series (transitions to n=1) of hydrogen.
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