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diff --git a/sample_notebooks/MukteshChaudhary/ch1_1.ipynb b/sample_notebooks/MukteshChaudhary/ch1_1.ipynb
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+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 1: Basic Ideas: Energy Bands in Solids"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 1, Page 8"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "#Variable decalaration\n",
+      "pd = 100   #potential difference, V\n",
+      "m0=9.11*(10**-31);#m0=rest mass of the electron in kg\n",
+      "\n",
+      "#Calculations&Results\n",
+      "#solving final velocity of the electron\n",
+      "Ek=1.6*(10**-19)*pd;#Ek=final kinetic energy of electron in Joules\n",
+      "print \"Final kinetic energy = %.1e J,%.f eV\"%(Ek,Ek*6.242*10**18)\n",
+      "v=math.sqrt((2*Ek)/m0)#v=final velocity of the electron\n",
+      "print \"Final velocity = %.3e m/s\"%v"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Final kinetic energy = 1.6e-17 J,100 eV\n",
+        "Final velocity = 5.927e+06 m/s\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 2, Page 8"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import math\n",
+      "\n",
+      "#Variable declaration\n",
+      "m=7360*9.11*(10**-31);#m=mass of the ion in kg\n",
+      "q=2*1.6*(10**-19);#q=charge of the ion in Coulomb\n",
+      "V=2000;#V=potential difference in Volt\n",
+      "\n",
+      "#Calculations&Results\n",
+      "#solving velocity & kinetic energy of the ion\n",
+      "v=math.sqrt((2*q*V)/m)#v=velocity of the ion\n",
+      "print \"Velocity acquired by the ion = %.3e m/s\"%v\n",
+      "Ek=(1./2)*m*(v**2)#Ek=kinetic energy of the ion\n",
+      "print \"Kinetic energy of ion = %.1e J = %.f eV\"%(Ek,Ek*6.242*10**18)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "Velocity acquired by the ion = 4.369e+05 m/s\n",
+        "Kinetic energy of ion = 6.4e-16 J = 3995 eV\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file