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+// Scilab code Ex4.2 : Pg:139 (2008)
+clc;clear;
+I1 = 100;    // Maxiumum intensity of interfering waves
+I2 = 1;    // Minimum intensity of interfering waves
+a1_ratio_a2 = sqrt(I1/I2);    // Ratio of two amplitudes
+a2 = 1;    // Assume the amplitude of second wave to be unity
+a1 = a2*a1_ratio_a2;    // The amplitude of second wave
+I_max = (a1+a2)^2;    // Maximum intensity of interfering waves
+I_min = (a1-a2)^2;    // Minimum intensity of interfering waves
+printf("\nThe ratio of maximum intensity to minimum intensity of the two interfering waves, I_max:I_min = %d:%d", I_max, I_min);
+
+// Result 
+// The ratio of maximum intensity to minimum intensity of the two interfering waves, I_max:I_min = 121:81 
+\ No newline at end of file