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+// Scilab Code Ex3.2 : Page-71 (2010)
+lambda1 = 4250e-010; // First wavelength emitted by source of light, m
+lambda2 = 5050e-010; // Second wavelength emitted by source of light, m
+D = 1.5; // Distance between the source and the screen, m
+d = 0.025e-03; // Distance between the slits, m
+n = 3; // Number of fringe from the centre
+x3 = n*lambda1*D/d; // Position of third bright fringe due to lambda1, m
+x3_prime = n*lambda2*D/d; // Position of third bright fringe due to lambda2, m
+printf("\nThe separation between the third bright fringe due to the two wavelengths = %4.2f cm", (x3_prime - x3)/1e-02);
+
+// Result
+// The separation between the third bright fringe due to the two wavelengths = 1.44 cm \ No newline at end of file