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// Scilab Code Ex3.10:: Page-3.24 (2009)
clc; clear;
f = 250; // Focal length of the lens, cm
x = 0.8; // Half width of central maxima, cm
lambda = 5500e-008; // Wavelength of light used, cm
// As x = f*lambda/a, solving for a
a = f*lambda/x; // Slit width in Fraunhofer single slit experiment
printf("\nThe slit width = %5.3f cm", a);
// Result
// The slit width = 0.017 cm
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