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- Length_contraction abstract "In physics, length contraction is the phenomenon of a decrease in length measured by an observer of objects which are traveling at any non-zero velocity relative to the observer. This contraction (more formally called Lorentz contraction or Lorentz–FitzGerald contraction after Hendrik Lorentz and George FitzGerald) is usually only noticeable at a substantial fraction of the speed of light. Length contraction is only in the direction parallel to the direction in which the observed body is travelling. This effect is negligible at everyday speeds, and can be ignored for all regular purposes. Only at greater speeds does it become relevant. At a speed of 13,400,000 m/s (30 million mph, 0.0447c), the contracted length is 99.9% of the length at rest; at a speed of 42,300,000 m/s (95 million mph, 0.141c), the length is still 99%. As the magnitude of the velocity approaches the speed of light, the effect becomes dominant, as can be seen from the formula:whereL0 is the proper length (the length of the object in its rest frame),L is the length observed by an observer in relative motion with respect to the object,v is the relative velocity between the observer and the moving object,c is the speed of light,and the Lorentz factor, γ(v), is defined as.In this equation it is assumed that the object is parallel with its line of movement. For the observer in relative movement, the length of the object is measured by subtracting the simultaneously measured distances of both ends of the object. For more general conversions, see the Lorentz transformations. An observer at rest viewing an object travelling very close to the speed of light would observe the length of the object in the direction of motion as very near zero.".
- Length_contraction thumbnail Lorentzkontraktion.png?width=300.
- Length_contraction wikiPageID "339024".
- Length_contraction wikiPageRevisionID "604312226".
- Length_contraction align "right".
- Length_contraction backgroundColor "white".
- Length_contraction caption "A rod is transported from S to S'".
- Length_contraction caption "In S all events parallel to the axis of x are simultaneous, while in S' all events parallel to the axis of x' are simultaneous.".
- Length_contraction direction "vertical".
- Length_contraction hasPhotoCollection Length_contraction.
- Length_contraction header Minkowski_diagram.
- Length_contraction image "LoedRodTransport.svg".
- Length_contraction image "Minkowski diagram - length contraction.svg".
- Length_contraction sign "Albert Einstein, 1911".
- Length_contraction text "The author unjustifiably stated a difference of Lorentz's view and that of mine concerning the physical facts. The question as to whether length contraction really exists or not is misleading. It doesn't "really" exist, in so far as it doesn't exist for a comoving observer; though it "really" exists, i.e. in such a way that it could be demonstrated in principle by physical means by a non-comoving observer.".
- Length_contraction width "250".
- Length_contraction subject Category:History_of_physics.
- Length_contraction subject Category:Length.
- Length_contraction subject Category:Special_relativity.
- Length_contraction comment "In physics, length contraction is the phenomenon of a decrease in length measured by an observer of objects which are traveling at any non-zero velocity relative to the observer. This contraction (more formally called Lorentz contraction or Lorentz–FitzGerald contraction after Hendrik Lorentz and George FitzGerald) is usually only noticeable at a substantial fraction of the speed of light.".
- Length_contraction label "Contracción de Lorentz".
- Length_contraction label "Contraction des longueurs".
- Length_contraction label "Contrazione delle lunghezze".
- Length_contraction label "Lengtecontractie".
- Length_contraction label "Length contraction".
- Length_contraction label "Lorentzkontraktion".
- Length_contraction label "Wzór Lorentza".
- Length_contraction label "Лоренцево сокращение".
- Length_contraction label "تقلص الأطوال".
- Length_contraction label "长度收缩".
- Length_contraction sameAs Kontrakce_délek.
- Length_contraction sameAs Lorentzkontraktion.
- Length_contraction sameAs Contracción_de_Lorentz.
- Length_contraction sameAs Lorentzen_uzkurdura.
- Length_contraction sameAs Contraction_des_longueurs.
- Length_contraction sameAs Contrazione_delle_lunghezze.
- Length_contraction sameAs Lengtecontractie.
- Length_contraction sameAs Wzór_Lorentza.
- Length_contraction sameAs m.01xvq1.
- Length_contraction sameAs Q836595.
- Length_contraction sameAs Q836595.
- Length_contraction wasDerivedFrom Length_contraction?oldid=604312226.
- Length_contraction depiction Lorentzkontraktion.png.
- Length_contraction isPrimaryTopicOf Length_contraction.