| 释义 |
relativity theory The theory in physics put forward by Albert Einstein in the early 20th century which fundamentally changed commonly held views of the universe and concepts of space and time which had previously been regarded as independent of one another. The special theory of relativity deals with the behaviour of particles in different frames of reference which are moving at constant relative speeds (see Lorentz transformation, Lorentz-Fitzgerald contraction, mass-energy equation, Minkowski space, simultaneity, time dilation). The general theory of relativity describes gravitational forces in terms of the curvature of space, caused by the presence of mass, and deals with the behaviour of particles in different frames of reference which are accelerating relative to one another. Light then moves along the geodesics of space-time, which allows for the phenomenon of gravitational lensing, where a distant object may appear as two images to an observer, as light from the object has travelled along two different geodesics around an intervening massive object.
https://www.allaboutscience.org/theory-of-relativity.htm • An article about relativity with a related video. |