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  1. 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 …

  2. A simplified introduction to Einstein’s theory of relativity

    Jan 26, 2017 · In this short article, we will explain what Einstein proposes to give you some insight. So, without further ado, here is our simplified explanation of the theory of relativity.

  3. Relativity | Definition, Equations, & Facts | Britannica

    Oct 24, 2025 · 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 …

  4. What Is Relativity? Einstein’s Groundbreaking Theory Explained

    May 5, 2025 · Today, the word “relativity” is nearly synonymous with Einstein, yet few grasp the depth and elegance of his ideas. In this comprehensive exploration, we will journey through …

  5. What is the theory of general relativity? Understanding …

    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 …

  6. Science Made Simple: What Is the Theory of Relativity?

    Nov 25, 2023 · What Is the Theory of Relativity? Relativity is two related theories: special relativity, which explains the relationship between space, time, mass, and energy; and general …

  7. DOE Explains...Relativity - Department of Energy

    Relativity is two related theories: special relativity, which explains the relationship between space, time, mass, and energy; and general relativity, which describes how gravity fits into the mix.

  8. Relativity Explained | Time-Space Theory & Impact

    May 27, 2024 · Explore Einstein’s theory of relativity, understanding its impact on modern physics, black holes, GPS technology, and the universe’s mysteries. The theory of relativity, introduced …

  9. Relativity | Institute of Physics

    In his special relativity theory, Einstein instead showed that the laws of physics and, crucially, the speed of light are the things that are constant. Fixing these meant that time and space could …

  10. Theory of Relativity: Einstein’s genius idea explained for …

    Dec 30, 2024 · This is the profound vision Albert Einstein presented to humanity with his General Theory of Relativity in 1915. More than a century later, this theory remains one of the …