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diff --git a/2411/CH3/EX3.d.306/Ex3d_6.sce b/2411/CH3/EX3.d.306/Ex3d_6.sce
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+++ b/2411/CH3/EX3.d.306/Ex3d_6.sce
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+// Scilab Code Ex3d.6: Page-207 (2008)
+clc; clear;
+n = 2;    // Order of diffraction
+lambda = 5e-005;    // Wavelength of light, cm
+theta = 30;    // Angle of diffraction, degree
+N = sind(theta)/(n*lambda);    // Number of lines per cm of grating, lines/cm
+printf("\nThe number of lines per cm of grating = %4d per cm", ceil(N));
+
+// Result
+// The number of lines per cm of grating = 5000 per cm 
+\ No newline at end of file