Electromagnetic Reactions and Structure of Light Nuclei Sonia Bacca TRIUMF, Canada The investigation of light nuclei with ab-initio methods provides an optimal setting to probe our present knowledge of nuclear forces, since the few-nucleon problem can be accurately solved. We believe, supported by recent advances in effective field theory, that nucleons interact not only in pairs but also via many-body forces. Theoretical efforts need to be taken towards the identification of bound and continuum nuclear observables sensitive to the less known many-nucleon forces. Electromagnetic reactions and structure properties of light nuclei close to the drip line can potentially provide us with useful informations on that. I will present new results on electron scattering off He4, with emphasis on the role of three-body forces and on the comparison with experiment. I will also report about our investigation of light halo nuclei in the helium isotope chain.