Energy-Momentum Tensor

The energy-momentum tensor is a mathematical object used in physics to describe how energy, momentum, and stress are distributed and flow through spacetime. It captures information about matter, radiation, and fields, indicating where and how much energy is present, how it moves, and how forces are exerted. This tensor is fundamental in Einstein’s theory of General Relativity because it influences the curvature of spacetime, effectively telling gravity how to behave based on the content and dynamics of everything in the universe.