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Graphics--ContourPlot output varies drastically with PlotPoints.

• To: mathgroup at smc.vnet.net
• Subject: [mg70977] Graphics--ContourPlot output varies drastically with PlotPoints.
• From: subimaldeb at rediffmail.com
• Date: Fri, 3 Nov 2006 01:39:28 -0500 (EST)

Hello,

I am new to this forum.

The following code should produce the interference of two plane waves. The output should not show as much variation as the following code shows. Please help me understand where I have gone wrong.

cm = 1.0;
fld[E0_, r : {_, _, _}, k : {_, _, _}, ph_] := E0*Exp[I*(k.r + ph)];

\[Lambda] = .0001*cm;
k = 2. \[Pi]/\[Lambda];
z = 100.*cm;

Table[
  
  ListContourPlot[
      Table[
        Abs[
                fld[1, {x, y, z}, {0, k, 0.}, 0.]
              + fld[1, {x, y, z}, {k, k, 0.}, 0.]
            ]^2,
        {x, -.5*cm, .5*cm, 1*cm/i}, {y, -.5*cm, .5*cm, 1*cm/i}],
      ContourLines -> False,
      Contours -> 100,
      Frame -> True,
      Background -> None];
  , {i, 10, 200, 20}];



With my regards,
Subimal

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