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// Scilab code Ex4.4 : Pg:140 (2008)
clc;clear;
I1 = 1.44; // Intensity of first wave
I2 = 4.00; // Intensity of second wave
I = 0.90; // Intensity of resultant wave
// As I_delta = I1 + I2 + 2*sqrt(I1*I2)*cos(delta), solving for delta
delta = acosd((I-I1-I2)/(2*sqrt(I1*I2)));
printf("\nThe lowest phase difference between the waves at interfering point = %3d degree", delta);
// Result
// The lowest phase difference between the waves at interfering point = 161 degree
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