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// Example 7.2.3 page 7.12
clc;
clear;
r=25d-6; //radius
R=39; //Lambertian emission pattern
NA=0.25; //numerical aperture
a=35d-6; //area
Pc1= %pi^2*a^2*R*NA^2; //computing coupled power when r<a
Pc1=Pc1*10^7;
Pc= %pi^2*r^2*R*NA^2; //computing coupled power when r>a
Pc=Pc*10^7;
printf("\nOptical power when r>a is %.2f mW.\nOptical power when r<a is %.3f mW.",Pc,Pc1);
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