Einstein field equations relate spacetime curvature to energy-momentum tensor
Image: Event Horizon Telescope, uploader cropped and converted TIF to JPG, CC BY 4.0, via Wikimedia Commons
Einstein field equations
Einstein field equations relate spacetime curvature to energy-momentum tensor
The Einstein field equations (EFE) are a set of tensor equations that describe how mass-energy and stress influence the curvature of spacetime. Published by Albert Einstein in 1915, these equations form the foundation of the general theory of relativity, linking the geometry of spacetime to the distribution of matter-energy within it.
Example
Consider a massive star collapsing into a black hole. The EFE predict how the star's mass-energy distribution alters the surrounding spacetime curvature, leading to the formation of a region with extremely strong gravitational effects, known as a black hole.
Remember this
Understanding the Einstein field equations is crucial for predicting gravitational phenomena and exploring the fundamental nature of spacetime and gravity.
Text adapted from Wikipedia, licensed under CC BY-SA 4.0.
Related concepts
Riemannian geometry
Riemannian geometry is essential for understanding curved spacetime
Theory of relativity
Can gravity bend light?
Planck constant
Did you know light and energy are linked by a tiny constant?
Gravitational lensing formalism
Light bends around massive objects due to spacetime curvature
Mass–energy equivalence
E=mc²
Schwarzschild metric
Schwarzschild radius at r=2GM/c² marks the event horizon
Swipe through more Physics concepts
Open Pocket Polymath