Hi! I read in my textbook, that when there is beta radioactivity, the beta particles are "carrying" the kinetic energy from the nuclei, and they are taking the most of the kinetic energy of the nuclei, so the electrons have less energy than them... Here is diagram. I can't understand something about the diagram. If I put straight horizontal line among one point, there will be two points [tex]M_1[/tex] and [tex]M_2[/tex], for different energy levels of the electrons (W is the kinetic energy of the electrons). Why it is like that? http://img151.imageshack.us/img151/7273/picture001copy1jg2.jpg http://img329.imageshack.us/img329/3677/picture001copyuc2.jpg Please help! Thank you.