Lecture
This lecture covers the fundamental concepts of particle physics, starting with the spatial scales of interactions, from gravitational to sub-nuclear forces. It explains the role of different particles, such as gravitons, photons, and gluons, in interacting with matter and forces. The lecture also delves into the equivalence of mass and energy, particularly focusing on the behavior of photons in isolated systems and their impact on energy conservation. Additionally, it discusses the momentum conservation principle and its application in understanding particle interactions within closed systems.