theory of relativity
Noun: 1. A fundamental theory in physics developed by Albert Einstein: This theory proposes that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum is constant, regardless of the motion of the light source or observer. It fundamentally changed the understanding of space, time, mass, and energy. 2. The concept that space and time are not separate and absolute but are interwoven into a single continuum (spacetime): Measurements of space and time are relative to the state of motion of the observer.
The term "theory of relativity" is used exclusively as a singular noun to refer to this specific scientific framework. It is typically preceded by the definite article "the" and often specified further as either the "special theory of relativity" (1905) or the "general theory of relativity" (1915).
- Einstein's theory of relativity revolutionized our understanding of the universe.
- The theory of relativity predicts phenomena such as time dilation and gravitational lensing.
- Experimental evidence has consistently supported the theory of relativity.
- The theory of relativity shows that mass and energy are equivalent, expressed by the famous equation E=mc².
- Special theory of relativity: The part of the theory dealing with physics in the absence of gravity, focusing on inertial frames of reference.
- General theory of relativity: The part of the theory that incorporates gravity, describing it as a curvature of spacetime caused by mass and energy.
- Relativity: Often used as a shorthand for the full term "theory of relativity."
- Relativistic (adj): Pertaining to or involving the theory of relativity (e.g., , ).
- Einstein's theory
- Relativity theory
- Spacetime: The four-dimensional continuum combining three-dimensional space with one-dimensional time, a central concept in the theory.
- Classical mechanics: The physics of Newton, which the theory of relativity superseded at high speeds or strong gravitational fields.
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(physics) the theory that space and time are relative concepts rather than absolute concepts
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