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diff --git a/2411/CH3/EX3.d.307/Ex3d_7.sce b/2411/CH3/EX3.d.307/Ex3d_7.sce
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+++ b/2411/CH3/EX3.d.307/Ex3d_7.sce
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+// Scilab Code Ex3d.7: Page-208 (2008)
+clc; clear;
+N = 5000;    // Number of lines per cm ruled on grating, lines/cm
+lambda = 6e-005;    // Wavelength of light, m
+a_plus_b = 1/N;    // Grating element, m
+theta = 90;    // Maximum angle of diffraction, degree
+n = a_plus_b*sind(theta)/lambda;    // Order of diffraction
+printf("\nIn highest order spectrum obtainable with the given diffraction grating = %4.2f", n);
+
+// Result
+// In highest order spectrum obtainable with the given diffraction grating = 3.33 
+\ No newline at end of file