  The Glauber model is extensively applied to heavy ion collision for
describing a number of interaction processes over a wide range of energies from
near the Coulomb barrier to higher energies. The model gives the
nucleus-nucleus interaction in terms of interaction between the constituent
nucleons with a given density distribution. The model is a semiclassical model
picturing the nuclear collision in the impact parameter representation where
the nuclei move along the collision direction in a straight path. In these
lectures we derive this model and discuss its applications in variety of
problems in nuclear and high energy physics.
