Robert A. Millikan (1868- 1953), although best known for his "oil-drop experiment," which measured the charge of an electron, also performed pioneering research on the photoelectric effect. In experiments on lithium, for example, Millikan observed a maximum kinetic energy of 0.550 eV when electrons were ejected with 433.9-nm light. When light of 253.5 nm was used, he observed a maximum kinetic energy of 2.57 eV.
(a) What is the work function, W0, for lithium, as determined from Millikan's results?
(b) What maximum kinetic energy do you expect Millikan found when he used light with a wavelength of 365.0 nm?