A neutrino is
an electrically neutral, weakly
interacting elementary subatomic
particle with half-integer spin. The neutrino is
denoted by the Greek letter ν. All
evidence suggests that neutrinos have mass but the upper bounds established for
their mass are tiny even by the standards of subatomic particles.
Can u beat him!!! |
Neutrinos
do not carry electric charge,
which means that they are not affected by the electromagnetic
forces that act on charged
particles such as electrons and protons. Neutrinos are affected only by the weak sub-atomic force, of much shorter
range than electromagnetism, and gravity, which is relatively weak on
the subatomic scale. Therefore a
typical neutrino passes through normal matter unimpeded.
Neutrinos
are created as a result of certain types of radioactive
decay, or nuclear reactions such as those that take place in the Sun, in nuclear reactors, or when cosmic rays hit atoms. There are three types, or
"flavours", of neutrinos: electron
neutrinos, muon neutrinos and tau
neutrinos. Each type is associated with an antiparticle,
called an "antineutrino", which also has neutral electric charge and
half-integer spin. Whether or not the neutrino and its corresponding
antineutrino are identical
particles has not yet been
resolved, even though the antineutrino has an opposite chirality to the neutrino.
Most
neutrinos passing through the Earth emanate from the Sun. About 65 billion (6.5×1010) solar neutrinos per second pass through every square
centimeter perpendicular to the direction of the Sun in the region of the Earth.
No comments:
Post a Comment