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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 applies to all …

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

    Jan 26, 2017 · As complex as the theory of relativity seems to be, it’s surprisingly simple. In this short article, we will explain what Einstein proposes to give you some insight.

  3. 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 …

  4. 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 relativity, which …

  5. What is the theory of general relativity? Understanding Einstein's ...

    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 special...

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

    May 5, 2025 · In this comprehensive exploration, we will journey through the origins, principles, implications, and experimental confirmations of relativity. Along the way, we will witness how …

  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.

  9. 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. …

  10. Special and General Relativity - Physics of the Universe

    The “ theory of relativity ” (or simply “ relativity ”) generally refers to two theories of Albert Einstein, his Special Theory of Relativity (or simply special relativity) of 1905, and his General Theory of Relativity …