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+// Scilab Code Ex4.1: Page-233 (2008)
+clc; clear;
+c = 3e+008;    // Speed of light in vacuum, m/s
+v = 3e+004;    // Speed of earth, m/s
+d = 7;    // Effective length of each path, m
+lambda = 7000e-010;    // Wavelength of light used, m
+n = 2*d*v^2/(lambda*c^2);    // Fringe shift
+printf("\nThe expected fringe shift = %3.1f", n);
+
+// Result
+// The expected fringe shift = 0.2 
+\ No newline at end of file