Source / pinned edition
Length Contraction
Source of package openstax.relativity · OpenStax University Physics, ch. 5 Relativity, module m58565
- work
- urn:openstax:clir:relativity#M58565
- number
- OpenStax University Physics, ch. 5 Relativity, module m58565
- kind
- urn:openstax:clir:relativity#treatise
m58565/index.cnxml at commit d0ed34a (main, 2026-06-11)
- edition
- urn:openstax:clir:relativity#M58565_MAIN
- language
- en
- officiality
- official
- materialisation
- PINNED_OFFICIAL_BYTES
- life cycle
- adopted: 2026-06-11
Publications
| URI | Type | documentHash | Retrieved |
|---|---|---|---|
| https://raw.githubusercontent.com/openstax/osbooks-university-physics-bundle/d0ed34a5851119a42e3d972dfc0ff49e4663977c/modules/m58565/index.cnxml | application/xml; charset=utf-8 | sha256:6847b09ecc1ad7fb82e1491d39967556247fd24e0abf34c449eee440252591e7 | 2026-09-06T00:00:00Z |
Fragments — 3
module/m58565#fs-id1167794072104 · section · referenced by: 2
en · official · sha256:ac9a8f2a5d2d77e9a859226df3c6a6fb33bfcc2cd08311a6b6a0e98b315b779d
<para id="fs-id1167794072104"><term id="term-00002">Length contraction</term> is the decrease in the measured length of an object from its proper length when measured in a reference frame that is moving with respect to the object:</para>Referencing norms: ContractedLengthFromProperLength, LengthContractionAgrees
module/m58565#fs-id1167794058670 · defn · referenced by: 2
en · official · sha256:e90e7fe8c7e91872fb15499d9ac0128d4b331814e8a4d2cf36cf8b309f8a41b7
<definition id="fs-id1167794058670">
<term>length contraction</term>
<meaning id="fs-id1167793692944">decrease in observed length of an object from its proper length <m:math><m:mrow><m:msub><m:mi>L</m:mi><m:mn>0</m:mn></m:msub></m:mrow></m:math> to length <emphasis effect="italics">L</emphasis> when its length is observed in a reference frame where it is traveling at speed <emphasis effect="italics">v</emphasis></meaning>
</definition>Referencing norms: LengthContractionRefuted, length_measured_in_the_moving_frame
module/m58565#fs-id1167793933707 · defn · referenced by: 1
en · official · sha256:2f2359f52aa65ca820e59e2dab68d91d46a7fdd79c9e2fc7c257b35c8e370367
<definition id="fs-id1167793933707">
<term>proper length</term>
<meaning id="fs-id1167793278452"><m:math><m:mrow><m:msub><m:mi>L</m:mi><m:mn>0</m:mn></m:msub><m:mo>;</m:mo></m:mrow></m:math> the distance between two points measured by an observer who is at rest relative to both of the points; for example, earthbound observers measure proper length when measuring the distance between two points that are stationary relative to Earth</meaning>
</definition>Referencing norms: proper_length
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