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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:df9996e09d849b24524dd415b626cbe4279b4acdbe25d68bb407e2d42467c7a7"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "11: Lattice dynamics"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example number 11.1, Page number 238"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#importing modules\n",
-      "import math\n",
-      "from __future__ import division\n",
-      "\n",
-      "#Variable declaration\n",
-      "h=6.626*10**-34;    #planck's constant(Js)\n",
-      "k=1.38*10**-23;   #boltzmann constant(J/K)\n",
-      "thetaD=350;    #temperature for Cu(K)\n",
-      "theetaD=550;   #temperature for Si(K)\n",
-      "\n",
-      "#Calculation\n",
-      "newDCu=k*thetaD/h;   #highest possible frequency for Cu(per sec)\n",
-      "newDSi=k*theetaD/h;  #highest possible frequency for Si(per sec)\n",
-      "\n",
-      "#Result\n",
-      "print \"highest possible frequency for Cu is\",round(newDCu/10**11,3),\"*10**11 per sec\"\n",
-      "print \"highest possible frequency for Si is\",round(newDSi/10**11,2),\"*10**11 per sec\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "highest possible frequency for Cu is 72.895 *10**11 per sec\n",
-        "highest possible frequency for Si is 114.55 *10**11 per sec\n"
-       ]
-      }
-     ],
-     "prompt_number": 3
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example number 11.2, Page number 238"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#importing modules\n",
-      "import math\n",
-      "from __future__ import division\n",
-      "\n",
-      "#Variable declaration\n",
-      "h=6.626*10**-34;    #planck's constant(Js)\n",
-      "k=1.38*10**-23;   #boltzmann constant(J/K)\n",
-      "N=6.02*10**26;   #avagadro number(k/mole)\n",
-      "T=10;   #temperature(K)\n",
-      "thetaD=105;   #debye temperature(K)\n",
-      "\n",
-      "#Calculation\n",
-      "C=(12/5)*(math.pi**4)*N*k*(T/thetaD)**3;   #specific heat of lead(J/K kmol)\n",
-      "newD=k*thetaD/h;    #highest frequency(per sec)\n",
-      "\n",
-      "#Result\n",
-      "print \"specific heat of lead is\",round(C,1),\"J/K kmol\"\n",
-      "print \"answer varies due to rounding off errors\"\n",
-      "print \"highest frequency is\",round(newD/10**11,2),\"*10**11 per sec\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "specific heat of lead is 1677.7 J/K kmol\n",
-        "answer varies due to rounding off errors\n",
-        "highest frequency is 21.87 *10**11 per sec\n"
-       ]
-      }
-     ],
-     "prompt_number": 6
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file