The lessons are cut for a six-month course. Requirements are the basic classical physics and calculation. The goal is an introduction to Modern Physics, necessarily concise and schematic, but taking into consideration the main topics of Special Relativity, Quantum Physics and its implications. These topics are closely related. The lessons will be accompanied by sufficient analytical tools to allow a full understanding of the contents and applications. The structure and meaning of the lessons are aimed at consolidating the understanding of the scientific and technological scenario related to modern physics. This requires a selection of topics in a logical progression that can be harmonised from the point of view of physical content and mathematical formalism. This by combining physics, experimental methods and applications. The arc crosses the Maxwell equations, the special relativity of Einstein, electromagnetism, waves and propagation, quantisation, the photon, the Schroedinger equation, Heisenberg’s uncertainty theorem, the Bohr atom.