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diff --git a/backup/Modern_Physics_version_backup/Chapter11.ipynb b/backup/Modern_Physics_version_backup/Chapter11.ipynb deleted file mode 100755 index 8b1cca27..00000000 --- a/backup/Modern_Physics_version_backup/Chapter11.ipynb +++ /dev/null @@ -1,151 +0,0 @@ -{ - "metadata": { - "name": "Chapter11" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "Chapter 11:Solid State Physics" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 11.1, Page 346" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#initiation of variable\n", - "c=769.0*10**3; Na=6.023*10**23; JeV=1.6*10**-19; #various constants and given values\n", - "\n", - "#calculation\n", - "Be=c/(Na*JeV); #Binding energy of an ion pair in the lattice\n", - "\n", - "#result\n", - "print\"The experimental value was found out to be in eV.\",round(Be,5);\n", - "\n", - "#partb\n", - "n=9.0;a=1.7476; R=0.281; k= 1.44; #Given values and consstants\n", - "Bc=k*a*(1-(1/n))/R; #ionic binding energy experimentally\n", - "\n", - "#result\n", - "print\"The calculated value of the binding energy in eV.is\",round(Bc,4);\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "The experimental value was found out to be in eV. 7.97983\n", - "The calculated value of the binding energy in eV.is 7.9606\n" - ] - } - ], - "prompt_number": 1 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 11.2, Page 350" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#initiation of variable\n", - "a=3.61;# amount of energy required to remove an electron from Cl- ion\n", - "b=-5.14 #amount of energy returned when an electron is added to Na+ ion\\\n", - "c=7.98 #binding energy of NaCl atom\n", - "\n", - "#calculation\n", - "E=a+b+c #sum of all the energies\n", - "print\"The net energy to be supplied in eV is\",round(E,3);" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "The net energy to be supplied in eV is 6.45\n" - ] - } - ], - "prompt_number": 2 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example 11.3, Page 355" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#initiation of variable\n", - "from math import exp,sqrt\n", - "Na=6.023*10**23; p=8.96*10**3; M=63.5*10**-3; #Na=avagadro's number,p=density,M=molar mass\n", - "\n", - "#calculation\n", - "n= p*Na/M; #density of charge carriers\n", - "\n", - "#result'\n", - "print\"The density of charge carriers in copper in atoms/m3 is %.1e\" %round(n,3);\n", - "\n", - "s=5.88*10**7;m=9.11*10**-31;e=1.6*10**-19; #charge & mass of an electron,resistance per unit length\n", - "t= s*m/(n*e**2); #average time between collisions\n", - "\n", - "#result\n", - "print \"The average time between collisions of conducting electrons in sec.is %.1e\" %t\n", - "\n", - "#partb\n", - "Ef=7.03*1.6*10**-19; #converting given enrgy to J\n", - "\n", - "#calculation\n", - "Vf=sqrt(2*Ef/m); #fermi velocity\n", - "l=Vf*t; #mean free path\n", - "\n", - "#result\n", - "print \"The average mean free path is\",l,\"m =\",round(l*10**9,3),\" nm\"\n" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "The density of charge carriers in copper in atoms/m3 is 8.5e+28\n", - "The average time between collisions of conducting electrons in sec.is 2.5e-14\n", - "The average mean free path is 3.8690296096e-08 m = 38.69 nm\n" - ] - } - ], - "prompt_number": 1 - } - ], - "metadata": {} - } - ] -}
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