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// Scilab code Ex5.6: Pg:217 (2008)
clc;clear;
Lambda = 6e-05; // Wavelength of spectral line, cm
n = 1; // First order principal maxima
aplusb = 1/160; // Grating element where a is the width of slit and b is the width of opaque region in a grating, cm
// since the grating equation is given by (a +b)*sint_theta = n*Lambda. On solving fot theta, we have
theta = asind(n*Lambda/aplusb); // Direction of principal maxima, minutes
printf("\nThe direction of principal maxima = %2d minutes", theta*60);
// Result
// The direction of principal maxima = 33 minutes
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