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diff --git a/Applied_Physics_by_S._Mani_Naidu/Chapter1.ipynb b/Applied_Physics_by_S._Mani_Naidu/Chapter1.ipynb new file mode 100644 index 00000000..e57ef537 --- /dev/null +++ b/Applied_Physics_by_S._Mani_Naidu/Chapter1.ipynb @@ -0,0 +1,285 @@ +{ + "cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# 1: Bonding in Solids" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example number 1, Page number 1-11" + ] + }, + { + "cell_type": "code", + "execution_count": 8, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "bond energy of molecule is -4.6 eV\n" + ] + } + ], + "source": [ + "#importing modules\n", + "import math\n", + "from __future__ import division\n", + "\n", + "#Variable declaration\n", + "e=1.6*10**-19; #charge(coulomb)\n", + "epsilon0=8.85*10**-12; \n", + "r0=236*10**-12; #equilibrium distance(m)\n", + "I=5.14; #ionisation energy(eV)\n", + "EA=-3.65; #electron affinity(eV)\n", + "\n", + "#Calculation\n", + "V=-(e**2)/(4*e*math.pi*epsilon0*r0); #potential(eV)\n", + "BE=I+EA+V; #bond energy of molecule(eV)\n", + "\n", + "#Result\n", + "print \"bond energy of molecule is\",round(BE,1),\"eV\"" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example number 2, Page number 1-11" + ] + }, + { + "cell_type": "code", + "execution_count": 11, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "cohesive energy per atom is -3.0684 eV\n", + "answer given in the book is wrong\n" + ] + } + ], + "source": [ + "#importing modules\n", + "import math\n", + "from __future__ import division\n", + "\n", + "#Variable declaration\n", + "e=1.602*10**-19; #charge(coulomb)\n", + "epsilon0=8.85*10**-12; \n", + "r0=0.314*10**-9; #equilibrium distance(m)\n", + "A=1.75; #madelung constant\n", + "n=5.77; #born constant\n", + "I=4.1; #ionisation energy(eV)\n", + "EA=3.6; #electron affinity(eV)\n", + "\n", + "#Calculation\n", + "V=-A*e**2*((n-1)/n)/(4*e*math.pi*epsilon0*r0);\n", + "CE=round(V,4)/2; #potential energy per ion(eV)\n", + "x=(I-EA)/2;\n", + "TCE=CE+x; #cohesive energy per atom(eV)\n", + "\n", + "#Result\n", + "print \"cohesive energy per atom is\",TCE,\"eV\"\n", + "print \"answer given in the book is wrong\"" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example number 3, Page number 1-12" + ] + }, + { + "cell_type": "code", + "execution_count": 14, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "cohesive energy per atom is -7.965 eV\n" + ] + } + ], + "source": [ + "#importing modules\n", + "import math\n", + "from __future__ import division\n", + "\n", + "#Variable declaration\n", + "e=1.602*10**-19; #charge(coulomb)\n", + "epsilon0=8.85*10**-12; \n", + "r0=0.281*10**-9; #equilibrium distance(m)\n", + "alphaM=1.748; #madelung constant\n", + "n=9; #born constant\n", + "\n", + "#Calculation\n", + "CE=-alphaM*e**2*((n-1)/n)/(4*e*math.pi*epsilon0*r0); #cohesive energy per molecule(eV)\n", + "\n", + "#Result\n", + "print \"cohesive energy per atom is\",round(CE,3),\"eV\"" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example number 4, Page number 1-12" + ] + }, + { + "cell_type": "code", + "execution_count": 16, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "potential energy of system is 5.75 eV\n" + ] + } + ], + "source": [ + "#importing modules\n", + "import math\n", + "from __future__ import division\n", + "\n", + "#Variable declaration\n", + "e=1.6*10**-19; #charge(coulomb)\n", + "epsilon0=8.85*10**-12; \n", + "r0=2.5*10**-10; #equilibrium distance(m)\n", + "\n", + "#Calculation\n", + "PE=e**2/(4*e*math.pi*epsilon0*r0);\n", + "\n", + "#Result\n", + "print \"potential energy of system is\",round(PE,2),\"eV\"" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example number 5, Page number 1-13" + ] + }, + { + "cell_type": "code", + "execution_count": 18, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "cohesive energy of NaCl is -3.46 eV\n" + ] + } + ], + "source": [ + "#importing modules\n", + "import math\n", + "from __future__ import division\n", + "\n", + "#Variable declaration \n", + "e=1.6*10**-19; #charge(coulomb)\n", + "r0=0.281*10**-9; #equilibrium distance(m)\n", + "a=1.748*10**-28; #madelung constant(J m**2)\n", + "n=9; #repulsive exponent value\n", + "m=1;\n", + "\n", + "#Calculations\n", + "Ur0=-a*(1-m/n)/(e*r0**m); #cohesive energy of NaCl(eV)\n", + "\n", + "#Result\n", + "print \"cohesive energy of NaCl is\",round(Ur0,2),\"eV\"" + ] + }, + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example number 6, Page number 1-13" + ] + }, + { + "cell_type": "code", + "execution_count": 23, + "metadata": { + "collapsed": false + }, + "outputs": [ + { + "name": "stdout", + "output_type": "stream", + "text": [ + "cohesive energy of molecule is -3.59 eV\n" + ] + } + ], + "source": [ + "#importing modules\n", + "import math\n", + "from __future__ import division\n", + "\n", + "#Variable declaration\n", + "e=1.6*10**-19; #charge(coulomb)\n", + "epsilon0=8.85*10**-12; \n", + "r0=0.281*10**-9; #equilibrium distance(m)\n", + "I=5.14; #ionisation energy(eV)\n", + "EA=-3.61; #electron affinity(eV)\n", + "\n", + "#Calculation\n", + "V=-(e**2)/(4*e*math.pi*epsilon0*r0); #potential(eV)\n", + "CE=I+EA+V; #cohesive energy of molecule(eV)\n", + "\n", + "#Result\n", + "print \"cohesive energy of molecule is\",round(CE,2),\"eV\"" + ] + } + ], + "metadata": { + "kernelspec": { + "display_name": "Python 2", + "language": "python", + "name": "python2" + }, + "language_info": { + "codemirror_mode": { + "name": "ipython", + "version": 2 + }, + "file_extension": ".py", + "mimetype": "text/x-python", + "name": "python", + "nbconvert_exporter": "python", + "pygments_lexer": "ipython2", + "version": "2.7.11" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |