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// Scilab code Ex5.27: Pg:233 (2008)
clc;clear;
Lambda = 6000e-08; //Mean wavelength of light, cm
a = 200; // Diameter of the objective of a telescope, cm
a_prime = 0.2; // Aperture of the eye lens, cm
f = 2.54; // Focal length of eye-piece, cm
theta = 1.22*Lambda/a; // The smallest angular separation resolvable by a telescope objective of diameter a, radian
theta_prime = 1.22*Lambda/a_prime; // The smallest angle that can be resolved by the eye where a^' is the aperture of the eye, radian
MP = theta_prime/theta; // Magnifying power of the telescope
// As MP = F/f, solving for F
F = MP*f; // The minimum focal length of the objective, cm
printf("\nThe minimum focal length of the objective if the full resolving power of the telescope is to be utilized = %4d cm", F);
// Result
// The minimum focal length of the objective if the full resolving power of the telescope is to be utilized = 2540 cm
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