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// Scilab Code EX3.46:: Page-3.59 (2009)
clc;clear;
lambda = 5461e-008;  // Wavelength of light used, cm
d = 4e-005;     // Separation distance between two self-luminous objects, cm
NA = 1.22*lambda/(2*d);     // Numerical aperture of microscope, cm

printf("\nThe numerical aperture of the objective of the microscopes = %6.4f cm", NA);

// Result
// The numerical aperture of the objective of the microscopes = 0.8328 cm