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 …

Meta description: Hear the pronunciation of relativity in American English, spoken by real native speakers. From North America's leading language experts, Britannica Dictionary

Oct 24, 2025 · General relativity is expressed in a set of interlinked differential equations that define how the shape of space-time depends on the amount of matter (or, equivalently, …

RELATIVITY meaning: a theory developed by Albert Einstein which says that the way that anything except light moves through time and space depends on the position and movement …

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 classical physics or the …

Dec 18, 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 …

According to relativity, time runs more slowly on her spacecraft than on Earth; therefore, when she returns to Earth, she will be younger than her Earth-bound sister. But in relativity, what one …

relativity, Concept in physics that measurements change when considered by observers in various states of motion.

Dec 17, 2025 · 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 …

Nov 14, 2025 · The theory of relativity grew out of contradictions between electromagnetic theory (worked out by Scottish physicist James Clerk Maxwell in the 1860s) and what people thought …