Assuming that the work function of the surface can be neglected, find the relation between the de-Broglie wavelength (λ) of the electrons emitted to the energy (Eυ) of the incident photons. Draw the nature of the graph for λ as a function of (Eυ).
Since work function is neglected, hence all the energy imparted by photons to electrons comes as kinetic energy. Let the kinetic energy of electrons be
K=12mv2=Eorv=√2Emormv=√2EmThus,λ=hmv=h√2Em