Image: Wave opposite-group-phase-velocity
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Description: Animated Plot of a wave with phase and group velocities in opposite directions. y(x,t)=(58−38⋅cos(2π(x−t)))⋅cos(2π(10x+4t)){\displaystyle y(x,t)=({\frac {5}{8}}-{\frac {3}{8}}\cdot \cos(2\pi (x-t)))\cdot \cos(2\pi (10x+4t))}
Title: Wave opposite-group-phase-velocity
Credit: Own work; This mathematical image was created with Mathematica
Author: Geek3
Usage Terms: Creative Commons Attribution 3.0
License: CC BY 3.0
License Link: http://creativecommons.org/licenses/by/3.0
Attribution Required?: Yes
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