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6. The lithium surface in a photoelectric cell will emit electrons when the incident light is blue. Platinum, however, requires ultraviolet light to eject electrons

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6. The lithium surface in a photoelectric cell will emit electrons when the incident light is blue. Platinum, however, requires ultraviolet light to eject electrons from its surface. [3] Which of the two metals has a larger value for its work function? Explain your

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