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3. Lithium, beryllium and mercury have work functions of 2.30 eV, 3.90 eV and 4.50 eV, respectively. Light with a wavelength of 400 nm is

3. Lithium, beryllium and mercury have work functions of 2.30 eV, 3.90 eV and 4.50 eV, respectively. Light with a wavelength of 400 nm is incident on each of these metals. a. Determine which of these metals exhibit the photoelectric effect for this incident light. Explain your reasoning. b. Calculate the maximum kinetic energy for the photoelectrons in each case

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