| Little neutral elementary particles without any electric | | | | directly in 1956. |
| charge, neutrinos usually have small mass resulting | | | | Similarly, the association of neutrino with muon was |
| from decay of other particles. Wolfgang Pauli was the | | | | detected only in 1962. Yet another type of neutrino |
| initial developer of the concept in the year 1930. | | | | that was associated with tau particle was identified |
| Working on energy conservation laws and | | | | first in 1970s but was detected only in the year 2000. |
| radioactivity, Pauli aimed at maintaining law of energy | | | | Another occasion when the neutrinos are emitted is |
| conservation at the time of beta decay. | | | | the time when a pion gets decayed and converts into |
| In course of radioactive nucleus emission of beta | | | | muon. Such emission also takes place in case of |
| particle the electron contained in it might retain energy | | | | decay of a host of other elementary particles. Since |
| from zero to a specific level. If the electron carries less | | | | the neutrinos are considerably stable, they can only be |
| than maximum possible value, the balance energies | | | | absorbed through the same weak interactions that |
| are taken away by undetected particles. Such neutral | | | | resulted in their creation. When neutrinos are energised, |
| elementary particle is called neutrinos. | | | | they can reverse the decay that caused its production. |
| Unique attribute of neutrinos is that its charge has to | | | | Oscillation theory propagated by the scientists hold that |
| be zero. Charged particles can be detected pretty | | | | neutrinos can change types while travelling through |
| easily. Also charge neutrinos would be a violation of | | | | space. Such transformation requires that they cannot |
| the law of energy conservation during beta decay. | | | | be mass less and should have a tiny amount of it. |
| Inventor of neutrino, Enrico Fermi opined that these | | | | Prolonged research and experimentation revealed the |
| particles are necessary element of conservation laws | | | | reasons of failure hitherto experienced by scientists. It |
| denoting momentum and spin. Neutrino just as the | | | | was found that they were trying to find one type of |
| electron is one of the leptons. While it plays a role in | | | | neutrino in another type. |
| the weak decay of the nuclear particles, it plays no | | | | That the neutrinos changed type while on the move, |
| such role in strong binding force of nuclei. Although the | | | | also conclusively established that they have mass |
| concept was discovered by Fermi, American physicist | | | | making possible such fusion reaction. |
| Frederic Reines and Clyde L Cowan detected it | | | | |