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// Scilab code Ex3.9 : Pg:109 (2008)
clc;clear;
mu_F = 1.5249; // Refractive index of violet color
mu_C = 1.5164; // Refractive index of red color
mu_D = (mu_F + mu_C)/2; // Mean refractive index
omega = (mu_F - mu_C)/(mu_D - 1); // Dispersive power of the lens
f = 40; // Focal length of the crown glass lens, cm
CA = omega*f; // The longitudinal chromatic abberation, cm
printf("\nThe longitudinal chromatic abberation = %6.4f cm", CA);
// Result
// The longitudinal chromatic abberation = 0.6530 cm
// The answer is given wrong in the textbook
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