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// Scilab Code Ex7.4:: Page-7.9 (2009)
clc; clear;
n1 = 1.54; // Refractive index of the core material
NA = 0.45; // Numerical aperture for the fibre
n2 = sqrt(n1^2-NA^2); // Refractive index of cladding
printf("\nThe refractive index of cladding = %4.2f", n2);
// Result
// The refractive index of cladding = 1.47
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