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+// Scilab Code Ex8.5:: Page-8.9 (2009)
+clc; clear;
+lambda = 7000;  // Wavelength of the emitted light, angstrom
+k = 8.6e-005;   // Boltzmann constant, eV/K
+dE = 12400/lambda;  // Energy difference of the levels, eV
+T = 27+273;   // Temperatures of the state, K
+N2_ratio_N1 = exp(-(dE/(k*T)));  // Relative population
+printf("\nThe relative population of two states in He-Ne laser at %d K = %3.1e", T, N2_ratio_N1);
+
+
+// Result 
+// The relative population of two states in He-Ne laser at 300 K = 1.5e-30 
+// The answer is given wrong in the textbook
+\ No newline at end of file