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Daw'r ffeil hon o Comin Wikimedia a gellir ei defnyddio gan brosiectau eraill. Dangosir isod y disgrifiad sydd ar dudalen ddisgrifio'r ffeil yno.

Crynodeb

Disgrifiad Illustration of a light cone, based on Image:Light cone.png
Dyddiad
Ffynhonnell Gwaith yr uwchlwythwr
Awdur Sakurambo
Diwygiadau eraill

[golygu]

The interval AB in the diagram to the right is 'time-like'. I.e. there is a frame of reference in which event A and event B occur at the same location in space, separated only by occurring at different times. If A precedes B in that frame, then A precedes B in all frames. It is hypothetically possible for matter (or information) to travel from A to B, so there can be a causal relationship (with A the cause and B the effect).

The interval AC in the diagram is 'space-like'. I.e. there is a frame of reference in which event A and event C occur simultaneously, separated only in space. However there are also frames in which A precedes C (as shown) and frames in which C precedes A. Barring some way of traveling faster than light, it is not possible for any matter (or information) to travel from A to C or from C to A. Thus there is no causal connection between A and C.

Trwyddedu

Public domain Cafodd y gwaith hwn ei ryddhau i'r parth cyhoeddus gan ei awdur, I, Sakurambo. Mae hyn yn weithredol ledled y byd.
Hwyrach nad yw hyn yn bosib yn ôl cyfraith rhai gwledydd; os felly:
Mae I, Sakurambo yn rhoi i unrhywun yr hawl i ddefnyddio'r gwaith hwn at unrhyw ddiben, heb unrhyw amodau, oddieithr unrhyw amodau gofynnol yn ôl y gyfraith.
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Illustration of a light cone

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23 Gorffennaf 2007

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cyfredol03:06, 27 Mai 2021Bawdlun y fersiwn am 03:06, 27 Mai 2021333 × 515 (8 KB)ÉpicoReverted to version as of 08:22, 23 July 2007 (UTC)
03:05, 27 Mai 2021Bawdlun y fersiwn am 03:05, 27 Mai 2021333 × 515 (11 KB)ÉpicoFile uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for pt.
08:22, 23 Gorffennaf 2007Bawdlun y fersiwn am 08:22, 23 Gorffennaf 2007333 × 515 (8 KB)Sakurambo~commonswikislight alteration
00:10, 23 Gorffennaf 2007Bawdlun y fersiwn am 00:10, 23 Gorffennaf 2007333 × 515 (8 KB)Sakurambo~commonswiki{{Information |Description=Illustration of a w:light cone, based on Image:Light cone.png |Source=self-made |Date=2007-07-23 |Author= Sakurambo }} The interval AB in the diagram to the right is 'time-like'. I.e. there is a fram

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