A narrow beam of electrons is pointed, in vacuum, directly towards a very small spherical target that carries a negative charge of Q = -2x10-11 C. The initial kinetic energy of an individual electron in the beam is ε0 = 100 eV (1 eV = 1.6x10-19 J) and the initial distance of the beam from the center of the target is 1 cm. At what distance from the center of the target will the electron beam be stopped and turned around? What will happen if the initial kinetic energy of the electron beam is 10 keV?