  Do neutrinos have nonzero masses? If they do, then these masses are very
tiny, and can be sought only in very sensitive experiments. The most sensitive
of these search for neutrino oscillation, a quantum interference effect which
requires neutrino mass and leptonic mixing. In these lectures, we explain what
leptonic mixing is, and then develop the physics of neutrino oscillation,
including the general formalism and its application to special cases of
practical interest. We also see how neutrino oscillation is affected by the
passage of the oscillating neutrinos through matter.
