If the photoelectric work function for lithium is 279.7 kJ/mol, (a) calculate the minimum energy (in Joule) required to eject an electron form the surface of lithium metal, (b) Calculate the minimum frequency (v;/s), and the longest wavelength (lambda; in nm) of light capable of producing photoelectric effect on lithium metal, (c) Which of these light, a violet light with wavelength, lambda = 412 nm, or a blue light with wavelength, lambda = 435 nm, would have enough energy to eject an electron from lithium? (d) For the light that is capable of ejecting an electron, calculate the kinetic energy and the velocity (speed) of the ejected electron.
