Time in physics: arrow, relativity, and perception

Le temps en physique : flèche, relativité et perception

IN BRIEF Arrow of time: concept linking physical time and our human perception. Relativity: prohibits any particle from moving faster than light. Exploration of different times: classical mechanics, general relativity. Elasticity of time: link between physics and neurosciences. Debate on the nature of time: illusion or fundamental entity? Reconciling physical time and psychological time: scientific … Read more

Singularities in physics: what do they mean?

Les singularités en physique : que signifientelles ?

IN BRIEF Gravitational singularity: region of spacetime where the laws of physics become vague. Has mathematical boundaries according to Einstein’s theory. References to Penrose and Hawking theorems regarding black holes. Singularities are points where certain physical parameters reach infinity. Veiled singularity implies that physical laws break down. Interest of cosmology in understanding time and space. … Read more

Thought experiments in theoretical physics

Les expériences de pensée en physique théorique

IN BRIEF Definition: A thought experiment is a hypothetical method used to explore complex concepts in theoretical physics. Steps: Includes formulating hypotheses, describing imaginary situations, and analyzing the results. Utility: Helps clarify theories, illustrate physical principles, and challenge preconceived notions. Famous examples: Include Galileo’s experiments on falling bodies and Einstein’s thoughts on relativity. Two categories: … Read more