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Diffstat (limited to 'backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter4.ipynb')
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diff --git a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter4.ipynb b/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter4.ipynb deleted file mode 100755 index 350acf21..00000000 --- a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter4.ipynb +++ /dev/null @@ -1,193 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:1d6457e2a94e0fa2b026a0acb8ba4fab526573258ee2c274c4328b7f611fb97a"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "4: Wave mechanical concepts"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 4.1, Page number 59"
- ]
- },
- {
- "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",
- "e=1.6*10**-19; #conversion factor from J to eV\n",
- "m=9.1*10**-31; #mass of electron(kg)\n",
- "V=1; #assume\n",
- "\n",
- "#Calculation\n",
- "lamda=h/math.sqrt(2*m*e*V); #debroglie wavelength(m)\n",
- "\n",
- "#Result\n",
- "print \"debroglie wavelength is math.sqrt(\",int((lamda*10**10)**2),\"/V) angstrom\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "debroglie wavelength is math.sqrt( 150 /V) angstrom\n"
- ]
- }
- ],
- "prompt_number": 9
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 4.2, Page number 59"
- ]
- },
- {
- "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",
- "c=3*10**8; #velocity of light(m/sec)\n",
- "e=1.6*10**-19; #conversion factor from J to eV\n",
- "m=9.1*10**-31; #mass of electron(kg)\n",
- "KE=100*10**6; #kinetic energy(eV)\n",
- "\n",
- "#Calculation\n",
- "p=math.sqrt(2*m*e); #momentum(kg m/s)\n",
- "lamda1=h/p; #debroglie wavelength for 1 eV(m)\n",
- "lamda2=h*c/(KE*e); #debroglie wavelength for 100 MeV(m)\n",
- "\n",
- "#Result\n",
- "print \"debroglie wavelength for 1 eV is\",round(lamda1*10**9,1),\"nm\"\n",
- "print \"debroglie wavelength for 100 MeV is\",round(lamda2*10**15,2),\"*10**-15 m\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "debroglie wavelength for 1 eV is 1.2 nm\n",
- "debroglie wavelength for 100 MeV is 12.42 *10**-15 m\n"
- ]
- }
- ],
- "prompt_number": 12
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 4.3, Page number 64"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "m=9.1*10**-31; #mass of electron(kg)\n",
- "v=4*10**6; #speed of electron(m/s)\n",
- "sp=1/100; #speed precision\n",
- "hbar=1.05*10**-34; \n",
- "\n",
- "#Calculation\n",
- "p=m*v; #momentum(kg m/s)\n",
- "deltap=p*sp; #uncertainity in momentum(kg m/s)\n",
- "deltax=hbar/(2*deltap); #precision in position(m)\n",
- "\n",
- "#Result\n",
- "print \"precision in position is\",round(deltax*10**9,2),\"nm\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "precision in position is 1.44 nm\n"
- ]
- }
- ],
- "prompt_number": 14
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 4.4, Page number 64"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "c=3*10**8; #velocity of light(m/sec)\n",
- "lamda=4000*10**-10; #wavelength(m)\n",
- "deltat=10**-8; #average lifetime(s)\n",
- "\n",
- "#Calculation\n",
- "delta_lamda=lamda**2/(4*math.pi*c*deltat); #width of line(m)\n",
- "\n",
- "#Result\n",
- "print \"width of line is\",round(delta_lamda*10**15,2),\"*10**-15 m\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "width of line is 4.24 *10**-15 m\n"
- ]
- }
- ],
- "prompt_number": 16
- }
- ],
- "metadata": {}
- }
- ]
-}
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