// 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