Antoine Lefevre 
IN BRIEF Gravitational singularity: a region of spacetime where the laws of physics become imprecise. Involves mathematical limits according to the Einstein theory. References to the Penrose theorems and Hawking regarding black holes. Singularities are points where certain physical parameters reach infinity. The hidden singularity implies that physical laws break down. Interest in cosmology to … Read more
IN BRIEF Must-watch scientific documentaries on physics. Discovering the universe through captivating films. Varied themes: from quantum to elementary particles. Best platforms to watch: Netflix, YouTube, and others. Recent films: Oppenheimer, The James Webb Telescope. Series to follow for learning: Rick and Morty, The Big Bang Theory. Impact of science on our daily lives and … Read more
IN BRIEF Medical physics: intersection between physics and medicine. Use of ionizing radiation for diagnosis and therapy. Medical imaging: techniques that transform diagnosis through various modalities. Role of the medical physicist in the development and application of imaging technologies. Ultrasound: use of sound waves for non-invasive imaging. Advances in radiotherapy for the treatment of diseases. … Read more
IN BRIEF Definition of semiconductors: materials that have intermediate electrical properties. Types of semiconductors: intrinsic and doped. Applications: found in smartphones, computers, and vehicles. Impact on power electronics: control and conversion of electrical energy. Key role in artificial intelligence: processing speed and energy efficiency. Recent innovations: evolution towards nano-technologies and reduction of energy consumption. Essential … Read more
IN BRIEF Chimiephysique.free.fr: Free courses and exercises for all levels from middle school to high school. PCCL: Site dedicated to physical chemistry for middle and high school. Labolycée: Access to various educational resources. Physique-chimie.fr: Content tailored for autonomous learning. Physics 2000: Resources in English to deepen concepts. Éduscol: Information on the use of digital technologies … Read more
IN BRIEF Renewable energies (RE): energy production modes from natural resources Examples: solar energy, wind energy, hydraulic energy, biomass, geothermal energy Characteristics: inexhaustible properties, respect for the environment Main sources: Sun and Earth Crucial role in the fight against climate change Positive impact: reduction of carbon footprint, ecological benefits Physical principles associated with renewable energy … Read more
IN BRIEF Multiverse: Concept of multiple coexisting universes. Hypotheses: Emanating from theoretical physics, notably the string theory. Parallel dimensions: Possibility of dimensions beyond our classical understanding. Cosmic inflation: Rapid expansion of the early universe suggesting other universes. Evidence: Difficulty in testing the multiverse hypothesis. Scientific speculations: Variety of possible scenarios surrounding the multiverse. Time travel: … Read more
IN BRIEF Fermi Paradox: Questions about extraterrestrial life. Schrödinger’s Cat Paradox: State of quantum superposition. Zenon’s Paradox: Challenges to the nature of motion. Archer’s Paradox: Relationship between movement and target. Black Hole Paradox: Problem of lost information. Dark Night Paradox: Cosmological inconsistency of the universe. Faint Young Sun Paradox: Issues regarding Earth’s past temperature. Resolution … Read more
IN BRIEF Natural phenomenon of electrostatic discharge. Occurs during thunderstorms in clouds called cumulonimbus. Accumulation of electric charges causing tremendous voltages. Occurs between clouds or between a cloud and the ground. Can reach temperatures of 30,000 °C. The speed of the discharge can exceed 200,000 km/h. Lightning is a common natural electric arc. Potential impacts … Read more
IN BRIEF Nature of light: form of visible electromagnetic energy. Visible spectrum: red (longest wavelength) to violet (shortest wavelength). White light: polychromatic, containing different radiations. Propagation: movement of energy without transportation of matter. Physical phenomenon: behaviors of waves and particles. Thermal exchanges: objects emit according to their temperature. Light is a fascinating phenomenon that plays … Read more