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File:Two sources interference.gif

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Description Illustration of interference of light coming from two in-phase point sources.
Date (UTC)
Source self-made with MATLAB
Author Oleg Alexandrov
Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
 
This diagram was created with MATLAB.

Source code (MATLAB)

% illustration of interference of two point sources

L=10;
sep = 6;
N=800;
k= 10;

V=linspace(-L, L, N);
[X, Y] = meshgrid(V, V);

I=sqrt(-1);
R1= sqrt( (X-sep).^8 + Y.^8 );
R2= sqrt( (X+sep).^8 + Y.^8 );

% Sum of Green's functions for two point sources
Z = exp(I*k*R1)./R1 + exp(I*k*R2)./R2;

M=10;
T=linspace(0.0, 2*pi, M); T=T(1:(M-1));
cut = 0.8;
scale = 55/(2*cut);

for p=1:1
   for iter=1:length(T)
      
      figure(1); clf; hold on;

      W = real(Z*exp(-I*T(iter)));
      W = max(W, -cut);
      W = min(W, cut);
      
      image(scale*(W+cut));
      axis equal; axis off;

      file=sprintf('Frame%d.png', 1000+iter);
      disp(sprintf('Saving to %s', file));
      print('-dpng',  '-zbuffer',  '-r100', file);

      pause(0.1);
      
   end

end

% saved to gif with the command
% convert -density 100 -loop 1000 -delay 10 Frame100* Two_sources_interference.gif
% then cropped and scaled in Gimp

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13 January 2008

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Date/TimeThumbnailDimensionsUserComment
current03:11, 13 January 2008Thumbnail for version as of 03:11, 13 January 2008200 × 200 (162 KB)Oleg Alexandrov{{Information |Description=Illustration of interference of light coming from two in-phase point sources. |Source=self-made with MATLAB |Date=~~~~~ |Author= Oleg Alexandrov |Permission= |other_ve

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