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   What are the two theories of relativity?

   • The theory of relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. Special relativity applies to all physical phenomena in the absence of gravity.

   Theory of relativity - Wikipedia

   en.wikipedia.org/wiki/Theory_of_relativity

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   What is general relativity theory?

   • Technically, general relativity is a theory of gravitation whose defining feature is its use of the Einstein field equations. The solutions of the field equations are metric tensors which define the topology of the spacetime and how objects move inertially. Einstein stated that the theory of relativity belongs to a class of "principle-theories".

   Theory of relativity - Wikipedia

   en.wikipedia.org/wiki/Theory_of_relativity

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   What was Einstein's theory of relativity?

   • relativity, wide-ranging physical theories formed by the German-born physicist Albert Einstein. With his theories of special relativity (1905) and general relativity (1915), Einstein overthrew many assumptions underlying earlier physical theories, redefining in the process the fundamental concepts of space, time, matter, energy, and gravity.

   Relativity | Definition, Equations, & Facts | Britannica

   www.britannica.com/science/relativity

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   What is the equation that governs general relativity?

   • Yet despite its success over more than 100 years, almost no one understands what the one equation that governs general relativity is actually about. Here, in plain English, is what it truly means. Einstein’s original equation relates spacetime curvature to the stress-energy of a system (top).

   How to understand Einstein’s equation for general relativity

   bigthink.com/starts-with-a-bang/einstein-general-theory-relativity-equation/

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2. www.britannica.com › science › E-mc2-equationE = mc² | Equation, Explanation, & Proof | Britannica

   www.britannica.com › science › E-mc2-equation

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   3 days ago · E = mc 2, equation in German-born physicist Albert Einstein’s theory of special relativity that expresses the fact that mass and energy are the same physical entity and can be changed into each other.

   • Kinetic Energy

     This formula is valid only for low to relatively high...

   • Albert Einstein

     Summarize This Article Albert Einstein (born March 14, 1879,...

   • Nuclear Fusion

     The formula is B = (Zm p + Nm n − M)c 2, where m p and m n...

   • Relativity

     Relativity, wide-ranging physical theories formed by the...

3. en.wikipedia.org › wiki › Theory_of_relativityTheory of relativity - Wikipedia

   en.wikipedia.org › wiki › Theory_of_relativity

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   The theory of relativity usually encompasses two interrelated physics theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. Special relativity applies to all physical phenomena in the absence of gravity.

4. Videos

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     The Maths of General Relativity (7/8) - The Einstein equation

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     General Relativity Explained in 7 Levels of Difficulty

     Feb 18, 2021

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     General Relativity Explained simply & visually

     Jun 20, 2020

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5. en.wikipedia.org › wiki › List_of_relativistic_equationsList of relativistic equations - Wikipedia

   en.wikipedia.org › wiki › List_of_relativistic_equations

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   Following is a list of the frequently occurring equations in the theory of special relativity.

6. en.wikipedia.org › wiki › Special_relativitySpecial relativity - Wikipedia

   en.wikipedia.org › wiki › Special_relativity

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   Special relativity is mathematically self-consistent, and it is an organic part of all modern physical theories, most notably quantum field theory, string theory, and general relativity (in the limiting case of negligible gravitational fields).

7. www.britannica.com › science › relativityRelativity | Definition, Equations, & Facts | Britannica

   www.britannica.com › science › relativity

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   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 reference. General relativity is concerned with gravity, one of the fundamental forces in the universe.

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9. www.space.com › 36273-theory-special-relativityEinstein's Theory of Special Relativity | Space

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   Feb 1, 2022 · The theory includes a way for the speed of light to define the relationship between energy and matter — small amounts of mass (m) can be interchangeable with enormous amounts of energy (E), as...

10. bigthink.com › starts-with-a-bang › einstein-generalHow to understand Einstein’s equation for general relativity

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    Sep 15, 2021 · Ethan Siegel. The Einstein field equations appear very simple, but they encode a tremendous amount of complexity. What looks like one compact equation is actually 16 complicated ones, relating the...