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relativistic

[rel-uh-tuh-vis-tik] /ˌrɛl ə təˈvɪs tɪk/
adjective
1.
of or relating to relativity or relativism.
2.
Physics.
  1. subject to the special or the general theory of relativity.
  2. (of a velocity) having a magnitude that is a significant fraction of the speed of light.
  3. (of a particle) having a relativistic velocity:
    radiation from relativistic electrons.
Origin
1885-1890
1885-90; relativist + -ic
Related forms
relativistically, adverb
ultrarelativistic, adjective
unrelativistic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for relativistic
  • Of course scientists are well aware of these relativistic effects, he notes.
  • One incorporated their newly hypothesised relativistic effects while the other did not.
  • Misconception is relativistic, it is not absolute, and depends on who is talking.
  • It concerns relativistic space travel as a folk song.
  • It has always seemed to me that a simple relativistic argument could point toward a conclusion similar to that of the authors.
  • We can understand non-relativistic quantum mechanics in terms of quantum field theory.
  • They could use a small proton star, which would allow a more smaller size ship, but would probably cause some relativistic havoc.
  • These intense relativistic interactions can be diagnosed using a suite of instruments.
British Dictionary definitions for relativistic

relativistic

/ˌrɛlətɪˈvɪstɪk/
adjective
1.
(physics) having or involving a speed close to that of light so that the behaviour is described by the theory of relativity rather than by Newtonian mechanics: a relativistic electron, a relativistic velocity
2.
(physics) of, concerned with, or involving relativity
3.
of or relating to relativism
Derived Forms
relativistically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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relativistic in Science
relativity
  (rěl'ə-tĭv'ĭ-tē)   
Either of two theories in physics developed by Albert Einstein, General Relativity or Special Relativity. See Notes at Einstein, gravity, space-time.

relativistic adjective
Our Living Language  : Albert Einstein's two theories of relativity were the first successful revisions of Newtonian mechanics—a mechanics so simple and intuitive that it was held to be a permanent fixture of physics. Uniting the theories is the idea that two observers traveling relative to each other may have different perceptions of time and space, yet the laws of nature are still uniform, and certain properties always remain invariant. Einstein developed the first theory, the theory of Special Relativity (1905), to explain and extend certain consequences of Maxwell's equations describing electromagnetism, in particular, addressing a puzzle surrounding the speed of light in a vacuum, which was predicted always to be the same, whether the light source is stationary or moving. Special Relativity considers the laws of nature from the point of view of frames of reference upon which no forces are acting, and describes the way time, distance, mass, and energy must be perceived by observers who are in uniform motion relative to each other if the speed of light must always turn out the same for all observers. Two implications of Special Relativity are space and time dilation. As speed increases, space is compressed in the direction of the motion, and time slows down. A famous example is the space traveler who returns to Earth younger than his Earth-dwelling twin, his biological processes proceeding more slowly due to his relative speed. These effects are very small at the speeds we normally experience but become significant at speeds approaching the speed of light (known as relativistic speeds). Perhaps the best-known implication of Special Relativity is the equation E=mc2, which expresses a close relation between energy and mass. The speed of light is a large number (about 300,000 km per second, or 186,000 mi per second), so the equation suggests that even small amounts of mass can be converted into enormous amounts of energy, a fact exploited by atomic power and weaponry. Einstein's General Theory of relativity extended his Special Theory to include non-inertial reference frames, frames acted on by forces and undergoing acceleration, as in cases involving gravity. The General Theory revolutionized the way gravity, too, was understood. Since Einstein, gravity is seen as a curvature in space-time itself.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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