File:Wave opposite-group-phase-velocity.gif

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Wave_opposite-group-phase-velocity.gif ‎(250 × 154 pixels, file size: 354 KB, MIME type: image/gif, looped, 50 frames, 4.0 s)

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Summary[edit]

Description
English: Animated Plot of a wave with phase and group velocities in opposite directions.
Date
Source

Own work;

 
This diagram was created with Mathematica.
Author Geek3

Source Code[edit]

 
This diagram was created with Mathematica.
Table[Plot[
  (5/8 - 3/8 * Cos[2 Pi (x - t)]) * Cos[2 Pi (10*x + 4*t)],
  {x, 0, 1}, PlotRange -> {-1, 1}, PlotStyle -> Thick, 
  PerformanceGoal -> "Quality" , ImageSize -> 250],
  {t, 0, 1 - 1/50, 1/50}]

File -> Save Selection As... -> wave_opposite-group-phase-velocity.gif

Bash commands for postprocessing (bash, ImageMagick, gifsicle): 

$ convert wave_opposite-group-phase-velocity.gif -crop 268x192 +repage wave.png
$ for i in wave-*.png; do convert $i -crop 250x154+9+0 +repage $i; done
$ convert wave-?.png wave-??.png  wave_opposite-group-phase-velocity.gif
$ rm wave-*.png
$ gifsicle -b --delay 8 --comment "http://commons.wikimedia.org/wiki/File:wave_opposite-group-phase-velocity.gif" wave_opposite-group-phase-velocity.gif

Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 3.0 Unported license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
You may select the license of your choice.

File history

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Date/TimeThumbnailDimensionsUserComment
current22:42, 2 April 2011Thumbnail for version as of 22:42, 2 April 2011250 × 154 (354 KB)Geek3 (talk | contribs)self created file

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