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+// Scilab Code Ex8.5 Calculation of wavelength of copper using Moseley's law Page-256 (2010)
+c = 3.0e+08;    // Speed of light, m/s
+lambda_W = 210e-010;    // Wavelength of K_alpha line of W, m
+Z_W = 74;    // Atomic number of tungsten
+Z_Cu = 29;    // Atomic number of copper
+b = 1;    // Constant for K-series
+// f_W = c/lambda_W = (a*73)^2, The frequency K_alpha line for tungsten, Hz
+// f_Cu = c/lambda_Cu = (a*28)^2, The frequency K_alpha line for copper, Hz
+// Dividing f_W by f_Cu and solving for lambda_Cu
+lambda_Cu = ((Z_W-b)/(Z_Cu-b))^2*lambda_W; // Wavelength of K_alpha line of Cu, m
+printf("\nThe wavelength of K_alpha line of copper = %4.0f angstrom", lambda_Cu/1D-10);
+// Result
+// The wavelength of K_alpha line of copper = 1427 angstrom
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