Theory of relativity - Wikipedia
The theory of relativity comprises two physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. [1] Special relativity applies to all …
Relativity | Definition, Equations, & Facts | Britannica
Jan 15, 2026 · Relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. Special relativity is limited to objects that are moving with respect to inertial frames of …
Einstein's Theory of Relativity - ThoughtCo
May 14, 2025 · Einstein's Theory of Relativity includes both general relativity and special relativity. Special relativity shows that time and space are not absolute and depend on the observer's motion. …
Einstein's Theory of General Relativity - Space.com
Oct 29, 2024 · General relativity is physicist Albert Einstein's understanding of how gravity affects the fabric of space-time. The theory, which Einstein published in 1915, expanded the theory of...
What Is Relativity? Einstein’s Groundbreaking Theory Explained
May 5, 2025 · In 1905, he published the Special Theory of Relativity, followed in 1915 by the General Theory of Relativity. These theories didn’t just alter physics—they changed our very conception of …
Einstein's Theories of Relativity - Encyclopedia.com
In formulating his special theory of relativity, Einstein assumed that the laws of physics are the same in all inertial (moving) reference frames and that the speed of light was constant regardless of the …
The main ideas involved in the most important of Einstein’s theories date back to this period. Amongst these may be mentioned: The Special Theory of Relativity, Inertia of Energy, Theory of the Brownian …