The engineer in physics is a specialist in the in-depth understanding of the physical phenomena at the basis of advanced technologies in order to master them, improve them and, above all, innovate. Both a physicist and an engineer, he applies the principles of physics to solving practical engineering problems. He often acts as a liaison between scientific and technological circles, between the science of physics and the world of industry. Integrator of many related disciplines through his multidisciplinary training, he is thus able to manage and understand specialist engineers.He studies the properties of matter, various forms of energy and equipment using the properties of physics (lights, radiation electromagnetic, waves, rays, radiations). He is particularly interested in potential developments in fields as diverse as the mechanics of fluids and deformable solids, optics and optoelectronics, aerodynamics, condensed matter physics and plasma physics. He also focuses on physics at the microscopic level, which involves the study of the quantum world and its applications in atomic, molecular, nuclear and solid-state physics. The applications he develops are found in many sectors. : optical fibers, lasers, transistors, microprocessors, integrated circuits, computer memories, air navigation systems, photonic gyroscopes, non-destructive testing on aircraft, surgical laser endoscopes, fiberscopes, medical imaging, laser surgery and hair removal, detectors power, solar collectors, semiconductors for photovoltaic cells, optical filters for network links, high speed receivers, leak detection devices, air quality measuring devices, mine mapping systems, laser rangefinders, gyrometers for ships and submarines, maritime navigation systems, missiles, mine detection, cryptography, night vision goggles, detection of chemical emissions, infrared monitoring, calculation of wind reactions for building bridges and skyscrapers, optical microscopes, observatory telescopes, etc.