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diff --git a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter2_1.ipynb b/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter2_1.ipynb deleted file mode 100755 index 59d9ea57..00000000 --- a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter2_1.ipynb +++ /dev/null @@ -1,295 +0,0 @@ -{
- "metadata": {
- "name": "",
- "signature": "sha256:f048d58df41f2578c151ef59f03652004b6758b9e666d170255be2c66115bfe2"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "2: Particle nature of radiation"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 2.1, Page number 28"
- ]
- },
- {
- "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",
- "new=100*10**6; #frequency(Hz)\n",
- "P=100*10**3; #power(watt)\n",
- "\n",
- "#Calculation\n",
- "E=h*new; #quantum of energy(J)\n",
- "n=P/E; #number of quanta emitted(per sec)\n",
- "\n",
- "#Result\n",
- "print \"number of quanta emitted is\",round(n/10**29,2),\"*10**29 per sec\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "number of quanta emitted is 15.09 *10**29 per sec\n"
- ]
- }
- ],
- "prompt_number": 2
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 2.2, Page number 31"
- ]
- },
- {
- "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",
- "lamda=400*10**-9; #wavelength(m)\n",
- "e=1.6*10**-19; #conversion factor from J to eV\n",
- "w0=2.28; #work function(eV)\n",
- "m=9.1*10**-31; #mass of electron(kg)\n",
- "\n",
- "#Calculation\n",
- "E=h*c/(lamda*e); #energy(eV)\n",
- "KEmax=E-w0; #maximum kinetic energy(eV)\n",
- "v2=2*KEmax*e/m; \n",
- "v=math.sqrt(v2); #velocity(m/s)\n",
- "\n",
- "#Result\n",
- "print \"maximum kinetic energy is\",round(KEmax,3),\"eV\"\n",
- "print \"velocity of photoelectrons is\",round(v/10**5,2),\"*10**5 m/s\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "maximum kinetic energy is 0.826 eV\n",
- "velocity of photoelectrons is 5.39 *10**5 m/s\n"
- ]
- }
- ],
- "prompt_number": 6
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 2.3, Page number 31"
- ]
- },
- {
- "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",
- "lamda=2000*10**-10; #wavelength(m)\n",
- "e=1.6*10**-19; #conversion factor from J to eV\n",
- "w0=4.2; #work function(eV)\n",
- "\n",
- "#Calculation\n",
- "lamda0=h*c/(w0*e); #cut off wavelength(m)\n",
- "E=h*c/(lamda*e); #energy(eV)\n",
- "sp=E-w0; #stopping potential(eV)\n",
- "\n",
- "#Result\n",
- "print \"cut off wavelength is\",int(lamda0*10**10),\"angstrom\"\n",
- "print \"stopping potential is\",round(sp,2),\"V\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "cut off wavelength is 2958 angstrom\n",
- "stopping potential is 2.01 V\n"
- ]
- }
- ],
- "prompt_number": 8
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 2.4, Page number 33"
- ]
- },
- {
- "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",
- "lamda=0.2*10**-9; #wavelength(m)\n",
- "\n",
- "#Calculation\n",
- "p=h/lamda; #momentum(kg m/s)\n",
- "m=p/c; #effective mass(kg)\n",
- "\n",
- "#Result\n",
- "print \"momentum is\",round(p*10**24,1),\"*10**-24 kg m/s\"\n",
- "print \"effective mass is\",round(m*10**32,1),\"*10**-32 kg\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "momentum is 3.3 *10**-24 kg m/s\n",
- "effective mass is 1.1 *10**-32 kg\n"
- ]
- }
- ],
- "prompt_number": 11
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 2.5, Page number 35"
- ]
- },
- {
- "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",
- "lamda=0.15; #wavelength(nm)\n",
- "m0=9.1*10**-31; #mass of electron(kg)\n",
- "theta1=0; #scattering angle1(degrees)\n",
- "theta2=90; #scattering angle2(degrees)\n",
- "theta3=180; #scattering angle3(degrees)\n",
- "\n",
- "#Calculation\n",
- "theta1=theta1*math.pi/180; #scattering angle1(radian)\n",
- "theta2=theta2*math.pi/180; #scattering angle2(radian)\n",
- "theta3=theta3*math.pi/180; #scattering angle3(radian)\n",
- "lamda_dash1=lamda+(h*(1-math.cos(theta1))/(m0*c)); #wavelength at 0(nm)\n",
- "lamda_dash2=lamda+(10**9*h*(1-math.cos(theta2))/(m0*c)); #wavelength at 90(nm)\n",
- "lamda_dash3=lamda+(10**9*h*(1-math.cos(theta3))/(m0*c)); #wavelength at 180(nm)\n",
- "\n",
- "#Result\n",
- "print \"wavelength at 0 degrees is\",lamda_dash1,\"nm\"\n",
- "print \"wavelength at 90 degrees is\",round(lamda_dash2,3),\"nm\"\n",
- "print \"wavelength at 180 degrees is\",round(lamda_dash3,3),\"nm\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "wavelength at 0 degrees is 0.15 nm\n",
- "wavelength at 90 degrees is 0.152 nm\n",
- "wavelength at 180 degrees is 0.155 nm\n"
- ]
- }
- ],
- "prompt_number": 18
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example number 2.6, Page number 36"
- ]
- },
- {
- "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",
- "E=2*0.511*10**6; #rest energy(eV)\n",
- "\n",
- "#Calculation\n",
- "lamda=h*c/(E*e); #wavelength of photon(m)\n",
- "\n",
- "#Result\n",
- "print \"wavelength of photon is\",round(lamda*10**12,2),\"*10**-12 m\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "wavelength of photon is 1.22 *10**-12 m\n"
- ]
- }
- ],
- "prompt_number": 21
- }
- ],
- "metadata": {}
- }
- ]
-}
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