Physics Scales and Measurements

This lecture covers the domains of physics, from nuclear to cosmology, exploring the scales from subatomic to astronomical. It delves into the importance of measurement in physics, detailing the historical definitions of the meter and kilogram. The lecture also discusses the concept of time, the definition of the second, and the advancements in timekeeping with atomic clocks. Additionally, it introduces the fundamental concepts of scalars and vectors in physics, explaining their properties and significance in describing physical quantities and motion.