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+//Example 5.2, Page Number 176
+//Relative Populations of energy levels
+clc;
+T=300 //Given Room Temperature in Kelvin
+l=550*(10**-9) //Average Wavelength of Visible Radiation in meter
+h=6.6*(10**-34) //Planck's Constant in meter square kilogram per second
+c=3*(10**8) //Speed Of Light in meters per second
+k=1.38*(10**-23) //Boltzman Constant in meter square kilogram per second square Kelvin 
+e=1.6*(10**-19) //Charge of an Electron in Coulombs
+
+E=(h*c)/l //E is the given Energy Difference
+E1=E/e
+
+N=exp((-1*E)/(k*T)) //N is the ratio of N2 and N1
+
+mprintf("\tThe Given Energy Difference of the Two Levels is %.2f eV\n",E1);
+
+mprintf("\tThe Relative Population of the Energy Levels is %.2e\n",N);
+//The minor difference arising is due to a round off error