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// Scilab Code Ex7.2:: Page-7.8 (2009)
clc; clear;
n1 = 1.50; // Refractive index of core material of fibre
n2 = 1.47; // Refractive index of cladding material of fibre
phi_C = asind(n2/n1); // Critical angle of optical fibre, degrees
NA = sqrt(n1^2-n2^2); // Numerical aperture for the fibre
theta_Q = asind(sqrt(n1^2-n2^2)); // Acceptance angle of optical fibre, degrees
printf("\nThe critical angle of optical fibre = %4.1f degrees", phi_C);
printf("\nThe numerical aperture for the fibre = %5.3f", NA);
printf("\nThe angle of acceptance cone = %5.1f degrees", theta_Q);
// Result
// The critical angle of optical fibre = 78.5 degrees
// The numerical aperture for the fibre = 0.298
// The angle of acceptance cone = 17.4 degrees
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