
- 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 … 
- Special relativity | Definition & Equation | Britannica- special relativity, part of the wide-ranging physical theory of relativity formed by the German-born physicist Albert Einstein. It was conceived by Einstein in 1905. Along with quantum … 
- General relativity | Gravitational Waves, Spacetime & Cosmology ...- Sep 12, 2025 · general relativity, part of the wide-ranging physical theory of relativity formed by the German-born physicist Albert Einstein. It was conceived by Einstein in 1916. General … 
- Relativity - Space-Time, Gravity, Physics | Britannica- Oct 24, 2025 · The answer is that Newton’s theory violates special relativity, for it requires an unspecified “action at a distance” through which any two objects—such as the Sun and … 
- Relativity - Time, Space, Mass | Britannica- Oct 24, 2025 · In developing special relativity, Einstein began by accepting what experiment and his own thinking showed to be the true behaviour of light, even when this contradicted … 
- E = mc² | Equation, Explanation, & Proof | Britannica- Oct 3, 2025 · His theory of relativity shifted contemporary understanding of space completely. Along with his equation E = mc2, it also foreshadowed the creation of the atomic bomb. 
- Relativity - Time, Space, Mass | Britannica- Oct 24, 2025 · Relativity - Time, Space, Mass: To derive further results, Einstein combined his redefinitions of time and space with two powerful physical principles: conservation of energy … 
- Relativity - Physics, Time, Space | Britannica- Aug 30, 2025 · The ideas of relativity were widely applied—and misapplied—soon after their advent. Some thinkers interpreted the theory as meaning simply that all things are relative, … 
- Albert Einstein's theory of relativity describing absolute quantities ...- The special theory of relativity, first described by Albert Einstein, was merely a statement of the realization that we were wrong-- distances in space and time are actually relative. They … 
- Relativistic mechanics | Einstein’s Theory of Relativity | Britannica- Before Einstein’s special theory of relativity was published in 1905, it was usually assumed that the time coordinates measured in all inertial frames were identical and equal to an “absolute …