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diff --git a/Principles_of_physics/chapter17.ipynb b/Principles_of_physics/chapter17.ipynb new file mode 100755 index 00000000..1e73b78e --- /dev/null +++ b/Principles_of_physics/chapter17.ipynb @@ -0,0 +1,216 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:57d22a7adb4054841cc52259e77089014f3c25ca9c50bc1dab4a74d78f09ccf3"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 17 Quantum theory"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 17.1 Page no 284"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "w=4000.0 #Wavelength of the light in Angstrom units\n",
+ "wf=2.25 #Work function of potassium in eV\n",
+ "m=(9.1*10**-31) #Mass of the electron in kg\n",
+ "v=(3*10**8) #Velocity of light in m/s\n",
+ "c=(1.6*10**-19) #Charge of the electron in coloumbs\n",
+ "h=6.626*10**-34 #Plancks constant in Js\n",
+ "\n",
+ "#Calculations\n",
+ "E=(h*v)/(w*10**-10*c)\n",
+ "KE=(E-wf)\n",
+ "\n",
+ "#Output\n",
+ "print\"Maximum kinetic energy of photoelectron is \",round(KE,3),\"eV\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Maximum kinetic energy of photoelectron is 0.856 eV\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 17.2 Page no 284"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "wf=1.9 #Workfunction of the material in eV\n",
+ "w=3000 #Wavelength of the light in Angstrom units\n",
+ "v=(3*10**8) #Velocity of light in m/s\n",
+ "c=(1.6*10**-19) #Charge of the electron in coloumbs\n",
+ "h=6.626*10**-34 #Plancks constant in Js\n",
+ "\n",
+ "#Calculations\n",
+ "V=(1/c)*(((h*v)/(w*10**-10))-(wf*c))\n",
+ "\n",
+ "#Output\n",
+ "print\"Stopping potential is \",round(V,2),\"V\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Stopping potential is 2.24 V\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 17.3 Page no 284"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "V=(70*10**3) #Accelerating potential in V\n",
+ "v=(3*10**8) #Velocity of light in m/s\n",
+ "c=(1.6*10**-19) #Charge of the electron in coloumbs\n",
+ "h=6.626*10**-34 #Plancks constant in Js\n",
+ "\n",
+ "#Calculations\n",
+ "lmin=((h*v)/(c*V))/10**-9\n",
+ "\n",
+ "#Output\n",
+ "print\"Shortest wavelength of X-rays produced is \",round(lmin,4),\"mm\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Shortest wavelength of X-rays produced is 0.0177 mm\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 17.4 Page no 284"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "w1=2 #Wavelength in Angstrom \n",
+ "Z1=24 #Target one\n",
+ "Z2=42.0 #Target two\n",
+ "a=1 #Constant value\n",
+ "\n",
+ "#Calculations\n",
+ "w2=w1*(Z1-a)**2/(Z2-a)**2\n",
+ "\n",
+ "#Output\n",
+ "print\"Wavelength is \",round(w2,2),\"Angstrom\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Wavelength is 0.63 Angstrom\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 17.5 Page no 284"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#given\n",
+ "w=3 #Wavelength of the light in Angstrom\n",
+ "v=(3*10**8) #Velocity of light in m/s\n",
+ "h=6.626*10**-34 #Plancks constant in Js\n",
+ "q=40 #Scattering angle in degrees\n",
+ "m=(9.11*10**-31) #Mass of electron in kg\n",
+ "c=(1.6*10**-19) #Charge of the electron in coloumbs\n",
+ "\n",
+ "#Calculations\n",
+ "import math\n",
+ "dl=(h/(m*v))*(1-math.cos(q*3.14/180.0))/10.0**-10\n",
+ "l=(w+dl)\n",
+ "\n",
+ "#Output\n",
+ "print\"Wavelength of scattered X-rays is \",round(l,4),\"Angstrom\"\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Wavelength of scattered X-rays is 3.0057 Angstrom\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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