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+// Scilab Code Ex2.13:: Page-2.13 (2009)
+clc; clear;
+b = 0.125; // Fringe width of the interfernce pattern due to biprism, cm
+d = 1; // For simplicity assume distance between sources to be unity, cm
+d_prime = 3/4*d; // New distance between sources, cm
+// As b is proportional to 1/d, so
+b_prime = b*d/d_prime; // New fringe width of the interfernce pattern due to biprism, cm
+
+printf("\nThe new value of fringe width due to reduced slit separation = %5.3f cm", b_prime);
+
+// Result
+// The new value of fringe width due to reduced slit separation = 0.167 cm