The backscattering process of 8–28 keV electrons from a thick tungsten target is studied. Measurements on the variation of the backscattering coefficient, η, with angle of incidence α and with diffusion range xd for different impact energies are presented and discussed. Simple analytical expressions based on continuous energy-loss and diffusion of incident electrons inside the target are used to examine the above variations. Over the entire ranges of impact energy and angle of incidence of the present studies, the predictions of the analytical relations are found to be in good agreement with most of our data and with those of earlier workers within experimental errors of measurement.