If a surface is illuminated with light of wavelength λ, the maximum kinetic energy of the emitted electrons is 1.1eV. When the wavelength .8λ is employed, the maximum kinetic energy of the emitted electrons rises to 1.92eV. When the wavelength .6λ is employed, the maximum kinetic energy of the emitted electrons rises to 2.559eV.
i) Determine the wavelength λ.
The value of h c is 1240 eV * nm.
ii) Determine the work function of the surface.