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Size of this PNG preview of this SVG file: 315 × 315 pixels. Other resolutions: 240 × 240 pixels | 480 × 480 pixels | 768 × 768 pixels | 1,024 × 1,024 pixels | 2,048 × 2,048 pixels.
Original file (SVG file, nominally 315 × 315 pixels, file size: 121 KB)
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:
- 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.
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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]] |
Items portrayed in this file
depicts
copyright status
copyrighted
copyright license
Creative Commons Attribution-ShareAlike 3.0 Unported
GNU Free Documentation License, version 1.2 or later
inception
21 April 2013
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 09:09, 6 March 2016 | 315 × 315 (121 KB) | OgreBot | (BOT): Reverting to most recent version before archival | |
09:09, 6 March 2016 | 450 × 450 (193 KB) | OgreBot | (BOT): Uploading old version of file from en.wikipedia; originally uploaded on 2013-04-21 04:36:04 by Ahalda | ||
14:44, 3 December 2014 | 315 × 315 (121 KB) | Antoni Salvà | Transferred from en.wikipedia |
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Width | 252pt |
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Height | 252pt |
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