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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:247cbf7511831aaf13adbf586a5a4c7c4e491e38e060a5558f6021f692906cbf"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "Chapter17-The Band Theory of Solids"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex1-pg522"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import math\n",
-      "##Example 17.1\n",
-      "##calculation of probability\n",
-      "\n",
-      "##given values\n",
-      "E=.01;##energy difference in eV\n",
-      "kT=.026;##temperture equivalent at room temp in e\n",
-      "\n",
-      "##calculation\n",
-      "P=1/(1+(math.e**(E/kT)));\n",
-      "\n",
-      "print'%s %.2f %s'%('interatomic spacing  is',P,'');\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "interatomic spacing  is 0.41 \n"
-       ]
-      }
-     ],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex2-pg523"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import math\n",
-      "##Example 17.2\n",
-      "##calculation of velocity of e\n",
-      "\n",
-      "##given values\n",
-      "e=1.6*10**-19.;##charge of e in C\n",
-      "E=2.1*e;##fermi level in J\n",
-      "m=9.1*10**-31.;##mass of e in kg\n",
-      "\n",
-      "##calculation\n",
-      "v=math.sqrt(2.*E/m);\n",
-      "\n",
-      "print'%s %.2f %s'%('velocity of e(in m/s)',v,'');\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "velocity of e(in m/s) 859337.85 \n"
-       ]
-      }
-     ],
-     "prompt_number": 2
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex3-pg523"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "import math\n",
-      "##Example 17.3\n",
-      "##calculation of velocity of fraction of free electrons\n",
-      "\n",
-      "##given values\n",
-      "E=5.5;##fermi level in eV\n",
-      "kT=.026;##temperture equivalent at room temp in e\n",
-      "\n",
-      "##calculation\n",
-      "f=2.*kT/E;\n",
-      "\n",
-      "print'%s %.4f %s'%('fraction of free electrone\\s upto width kT on either side of Ef is',f,'');\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "fraction of free electrone\\s upto width kT on either side of Ef is 0.0095 \n"
-       ]
-      }
-     ],
-     "prompt_number": 3
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file