SCIENTIFIC MOTIVATION FOR CEBAF CEBAF addresses fundamental problems in nuclear physics The role of mesons, excited baryons and quarks The strong force, including non-perturbative - The effect of the nuclear medium on nucleon Electrons are precise, versatile probes of nuclear structure Small cross section: ~10:40 cm2 Well understood interaction: QED (perturbative) Probe the entire nuclear volume Variable energy and momentum transfer |