Relativity, decays and electromagnetic fields (concepts of physics)

After introducing the metric in classical Euclidean space, we move to Minkowski's concept of four- vectors in space-time, dealing with topics of restricted relativity, such as Lorentz transformations and Lorentz invariants.

We obtain the relativistic expressions of the total energy, the energy at rest and the kinetic energy of a free particle, showing also their non-relativistic limits.