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Diffstat (limited to '1847/CH3/EX3.44/Ch03Ex44.sce')
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diff --git a/1847/CH3/EX3.44/Ch03Ex44.sce b/1847/CH3/EX3.44/Ch03Ex44.sce new file mode 100755 index 000000000..067b67177 --- /dev/null +++ b/1847/CH3/EX3.44/Ch03Ex44.sce @@ -0,0 +1,24 @@ +// Scilab Code EX3.44:: Page-3.57 (2009) +clc;clear; +w = 2; // Width of the grating, cm +P = 4500; // Total number of lines on the grating +a_plus_b = w/P; // Grating element, cm +lambda1 = 5890e-008; // Wavelength of sodium D1 line, cm +lambda2 = 5896e-008; // Wavelength of sodium D2 line, cm +lambda = (lambda1+lambda2)/2; // Mean wavelength of light used, cm +d_lambda=lambda2-lambda1; // Difference in wavelengths of D-lines of sodium, cm +n = 2; // Order of diffraction +// As a_plus_b*sind(theta)=n*lambda, solving for theta +theta = asind(n*lambda/a_plus_b); // Angle of diffraction, degrees +DP = n/(a_plus_b*cosd(theta)); // Dispersive power of grating +d_theta = DP*d_lambda*180/%pi; // Angular separation between D-lines, degrees +RP = lambda/d_lambda; // Required resolving power of grating for sodium lines +N = 2.54/a_plus_b; // No. of lines per cm on grating, lines/cm +RP_cal = n*N; // Calculated resolving power of grating + +printf("\nThe angle of diffraction for maxima in second order = %6.4f degrees", d_theta); +printf("\nAs %5.3e > %3d, D-lines can be resolved.", RP_cal, RP); + +// Result +// The angle of diffraction for maxima in second order = 0.0160 degrees +// As 1.143e+04 > 982, D-lines can be resolved. |