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 |
|
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