File:Wave packet.svg
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Size of this PNG preview of this SVG file: 800 × 579 pixels. Other resolutions: 320 × 232 pixels | 640 × 463 pixels | 1,024 × 741 pixels | 1,280 × 926 pixels | 2,560 × 1,852 pixels | 5,478 × 3,964 pixels.
Original file (SVG file, nominally 5,478 × 3,964 pixels, file size: 29 KB)
| Description | Illustration of a wave packet. |
| Date | (UTC) |
| Source | Self made, based on Image:Photon paquet onde.png. Released in the public domain. |
| 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. |
% Illustration of a wave packet
L = 1.7; % 2*L=length of domain
A = 1.2; % max amplitude
K = 1.3; % gaussian param
fast_wl = 52;
slow_wl = 4;
N = 500; % num of data points
lw = 40; % linewidth of curves
X = linspace(-L, L, N);
%Y = cos(X*slow_wl)./(1 + (X/K).^2);
q=1.5;
Y = A*cos(abs(X).^q*slow_wl).*exp(-K*X.^2);
num_P=1; % how many periods to keep
Y( find (abs(X) > ((2*num_P+0.5)*pi/slow_wl)^(1/q)) )=0;
Z = Y.*cos(fast_wl*X);
% KSmrq's colors
red = [0.867 0.06 0.14];
blue = [0, 129, 205]/256;
green = [0, 200, 70]/256;
yellow = [254, 194, 0]/256;
white = 0.99*[1, 1, 1];
black = [0, 0, 0];
figure(1); clf; hold on; axis equal; axis off;
lw2=0.7*lw;
plot(X, Y, 'color', red, 'linewidth', lw2, 'linestyle', '--')
plot(X, -Y, 'color', red, 'linewidth', lw2, 'linestyle', '--')
plot(X, Z, 'color', blue, 'linewidth', lw)
saveas(gcf, 'Wave_packet.eps', 'psc2') % save as eps
%plot2svg(Wave_packet.svg') % save as svg (need the svg package for that)
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:40, 2 December 2007 | | 5,478 × 3,964 (29 KB) | wikimediacommons>Oleg Alexandrov | Tweak |
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