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(a) If the work function for a certain metal is 1.9 eV, what is the stopping potential for electrons ejected from the metal when light

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(a) If the work function for a certain metal is 1.9 eV, what is the stopping potential for electrons ejected from the metal when light of wavelength 421 nm shines on the metal? (b) What is the maximum speed of the ejected electrons? (a) Number n Units ' V' (b) Number n Units ' V

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