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D threshold frequency for litium is 5.5*10^14HZ. Cal d work function for litium. If a...

D threshold frequency for litium is 5.5*10^14HZ. Cal d work function for litium. If a litium eliminated by a light of wavelength 450nm....2,.. Cal Emax for the emited photo electron {1ev=1.6*10^-19J, 1NM=10^-9m}?
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