File:Stokes aether drag.svg
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Original file (SVG file, nominally 315 × 315 pixels, file size: 121 KB)
This file is from Wikimedia Commons and may be used by other projects. The description on its file description page there is shown below.
Summary
DescriptionStokes aether drag.svg |
English: Diagram illustrating Stokes' aether drag theory in the sun's rest frame. The aether velocity is shown in black vectors, the earth is shown moving at velocity v, and a light ray is shown being bent from the vertical. |
Date | |
Source | pylab, scipy, inkscape, matplotlib |
Author | BlankAxolotl |
SVG development InfoField | This W3C-invalid plot was created with Matplotlib. |
Source code InfoField | Python code#!/usr/bin/env python2
from pylab import *
from matplotlib import patches, path
class FlowField:
def __init__(self, v, R):
self.v = v
self.R = R
def __call__(self, x,y):
r2 = x**2 + y**2
theta = arctan(y/x)
vr = self.v*(1 - self.R**2/r2)*cos(theta)
vtheta = -self.v*(1 + self.R**2/r2)*sin(theta)
return (vr*cos(theta) - vtheta*sin(theta),
vr*sin(theta) + vtheta*cos(theta))
R=3
v = -10
vel = FlowField(v, R)
width = 12
span = arange(0,width,1.3)
span = r_[-span[::-1],span]
X,Y = meshgrid(span,span)
R2 = X**2 + Y**2
U,V = vel(X,Y)
U = U - v
U[R2 < R**2] = nan
V[R2 < R**2] = nan
#make up a trajectory. This is a totally made up trajectory.
dy = -0.001
x,y = 2.5,width
ux, uy = 0, -30000.0
traj = []
for i in range(int(abs(width/dy))):
uxp,uyp = vel(x,y)
ux += uxp-v; uy += uyp
t = dy/uy
y += uy*t; x += ux*t
traj.append((x,y))
traj = array(traj)
traj = traj[sum(traj**2,1) > R*R]
raycolor = 'brown'
earthcolor = (0.4,0.4,0.9)
fig = figure(figsize=(3.5,3.5), facecolor='white')
ax = Axes(fig,[0,0,1,1],yticks=[],xticks=[],frame_on=False)
fig.add_axes(ax)
ax.add_patch(patches.FancyArrowPatch(path=path.Path(traj),arrowstyle='-
|
Licensing
Ahalda at English Wikipedia, the copyright holder of this work, hereby publishes it under the following licenses:
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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: Ahalda at English Wikipedia
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
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Original upload log
The original description page was here. All following user names refer to en.wikipedia.
Date/Time | Dimensions | User | Comment |
---|---|---|---|
2013-04-23 21:29 | 315×315× (123644 bytes) | Ahalda | |
2013-04-21 04:36 | 450×450× (197690 bytes) | Ahalda | Uploading a self-made file using [[Wikipedia:File_Upload_Wizard|File Upload Wizard]] |
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Items portrayed in this file
depicts
21 April 2013
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 11:09, 6 March 2016 | 315 × 315 (121 KB) | wikimediacommons>OgreBot | (BOT): Reverting to most recent version before archival |
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