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+// Energies of electrons in conduction band
+// Basic Electronics
+// By Debashis De
+// First Edition, 2010
+// Dorling Kindersley Pvt. Ltd. India
+// Example 1-5 in page 21
+
+clear; clc; close;
+
+// Data given
+h=1.05*10^-34; // Constant of calculation Js
+k=0.1,0.1,0,0; // Values of k-vector
+m_c=0.067*0.091*10^-30; // Effective mass of conduction electron
+
+// Calculation
+E=(h^2*(((0.1*10^10)^2)+((0.1*10^10)^2)))/(2*m_c);
+A= E/(1.6*10^-19);
+
+printf("Energy of conduction electron is %0.3f eV",A);
+
+// Result
+// Energy of conduction electron in the vertically upward direction = 11.302 eV
+// The non parabolic E-k dispersion relation is more appropriate here
+\ No newline at end of file
diff --git a/181/CH1/EX1.5/example1_5.txt b/181/CH1/EX1.5/example1_5.txt
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+Energy of conduction electron is 11.302 eV 
+\ No newline at end of file