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+//Optoelectronics - An Introduction, 2nd Edition by J. Wilson and J.F.B. Hawkes
+//Example 2.2
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+
+//given
+//Let the quanity 'me/m' be denoted by M
+M=0.26;
+Epsilonr=11.8//relative permittivity of Si
+
+Ed=13.6*M/(Epsilonr^2);//Energy required to excite the electrons from donor levels to the conduction band in eV
+mprintf("Ed = %.3f eV", Ed);