Neutrinos

Neutrinos are very small and non-interactive, electrically neutral particles of matter. Neutrinos were first predicted, then discovered slightly after the first fusion reaction was created. The neutrino particle was called upon to account for all of the missing mass, energy, and atomic spin which was detected from the aftermath of the fusion reaction. The neutrino has either a very small mass, or no mass (no mass has yet been assigned to the neutrino, but current experiments predict that if the neutrino has mass-energy, it will be below 12 e.v.). The neutrino also has a property called atomic spin.

The neutrino is very non-reactive. If a beam of neutrinos passed through a mass consisting of a sheet of lead one light-year in thickness, it has been predicted that at least 50% of the neutrinos would remain. Since capturing any specific neutrino is so difficult, scientists have not been able to conclusively demonstrate whether the neutrino has any mass. Originally, theories predicted that the neutrinos could travel only at the speed of light, and to do this they had to remain totally massless. Recent theories have predicted that neutrinos may indeed have some mass. The upper limit has been established at an energy equivalent 12 e.v., or electron volts. (This would be the equivalent energy an electron would acquire if it passed through an electrical field with a potential of 12 volts.)