1- What wavelength of light is required to eject electrons from sodium (W = 1.3 eV) if the kinetic energy of the electrons is 3.2 eV?2- determine the deBroglie wavelength of an electron with energy of 54 eV.

1- What wavelength of light is required to eject electrons from sodium (W = 1.3 eV) if the kinetic energy of the electrons is 3.2 eV?2- determine the deBroglie wavelength of an electron with energy of 54 eV.