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// Scilab Code Ex3.16:: Page-3.27 (2009)
clc; clear;
lambda = 5500e-008; // Wavelength of light used, cm
x = 3.9e-001; // Half width of central maximum, cm
f = 220; // Focal length of the lens, cm
n = 1; // Order for first order diffraction
// As a*sin(theta) = n*lambda, a*theta = n*lambda
// As theta = lambda/a and theta = x/f, solving for a
a = lambda*f/x; // Half angular width at central maximum, cm
printf("\nThe width of the slit = %3.1e cm", a);
// Result
// The width of the slit = 3.1e-002 cm
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