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diff --git a/modern_physics_by_Satish_K._Gupta/chap20.ipynb b/modern_physics_by_Satish_K._Gupta/chap20.ipynb new file mode 100644 index 00000000..b99b0934 --- /dev/null +++ b/modern_physics_by_Satish_K._Gupta/chap20.ipynb @@ -0,0 +1,255 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:17722fc50855830105e8bbc1d5e7f4e9c2450186689d4bcffcae55541cf58a10"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 20 Electromagnetic Waves"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 20.1 Page no 618"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "L=5.5*10**-7 #m\n",
+ "c=3*10**8 #m s**-1\n",
+ "u=1.5\n",
+ "\n",
+ "#Calculation\n",
+ "V=c/L\n",
+ "T=L/c\n",
+ "v=c/u\n",
+ "L1=v*T\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) The frequency is\",round(V*10**-14,3),\"10**8\",\"MHz\",\"and time period is\",round(T*10**15,1),\"10**-19\",\"micro s\"\n",
+ "print\"(b) The wavelenght in glass is\",round(L1*10**7,1),\"10**-7\",\"m\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) The frequency is 5.455 10**8 MHz and time period is 1.8 10**-19 micro s\n",
+ "(b) The wavelenght in glass is 3.7 10**-7 m\n"
+ ]
+ }
+ ],
+ "prompt_number": 20
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 20.2 Page no 619"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "V=2*10**8 #m s**-1\n",
+ "Ur=1.0\n",
+ "C=3*10**8\n",
+ "\n",
+ "#Calculation\n",
+ "Er=(C**2)/(V**2*Ur)\n",
+ "\n",
+ "#Result \n",
+ "print\" The relative permittivity is\",Er"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " The relative permittivity is 2.25\n"
+ ]
+ }
+ ],
+ "prompt_number": 24
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 20.3 Page no 619"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "C=3*10**8\n",
+ "V=10**8\n",
+ "E0=0.5\n",
+ "\n",
+ "#Calculation\n",
+ "L=C/V\n",
+ "Bz=E0/C\n",
+ "\n",
+ "#Result\n",
+ "print\"(a) There is the positive direction of x-axis of propagation of electromagnetic waves\"\n",
+ "print\"(b) The wavelengh of the wave is\",L,\"m\"\n",
+ "print\"(c) The component of associated magnetic field is\",round(Bz*10**9,0),\"cos(2*math.pi*10**8(t-x/c))\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(a) There is the positive direction of x-axis of propagation of electromagnetic waves\n",
+ "(b) The wavelengh of the wave is 3 m\n",
+ "(c) The component of associated magnetic field is 2.0 cos(2*math.pi*10**8(t-x/c))\n"
+ ]
+ }
+ ],
+ "prompt_number": 35
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 20.4 Page no 619"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "L=6*10**-3 #m\n",
+ "E0=33 #V m**-1\n",
+ "C=3.0*10**8\n",
+ "\n",
+ "#Calculation\n",
+ "import math\n",
+ "W=(2*math.pi*C)/(L)\n",
+ "B=E0/C\n",
+ "\n",
+ "#Result\n",
+ "print\"Magnetic field is\",B,\"sin*math.pi*10**11(t-x/c)\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Magnetic field is 1.1e-07 sin*math.pi*10**11(t-x/c)\n"
+ ]
+ }
+ ],
+ "prompt_number": 41
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 20.5 Page no 619"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "I=8\n",
+ "E0=8.85*10**-12\n",
+ "C=3*10**8\n",
+ "\n",
+ "#Calculation\n",
+ "import math\n",
+ "e0=math.sqrt((2*I)/(E0*C))\n",
+ "\n",
+ "#Result\n",
+ "print\"The amplitude of the electric field is\",round(e0,1),\"N C**-1\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "The amplitude of the electric field is 77.6 N C**-1\n"
+ ]
+ }
+ ],
+ "prompt_number": 46
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 20.6 Page no 619"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#Given\n",
+ "L=0.024 #m\n",
+ "k=5.9*10**-9\n",
+ "c=3*10**8\n",
+ "\n",
+ "#Calculation\n",
+ "V=L/k\n",
+ "t=L/c\n",
+ "\n",
+ "#Result\n",
+ "print\"(i) The number of oscillation is\",round(V*10**-6,3),\"10**6\",\"Hz\"\n",
+ "print\"(ii) The coherence time is\",t,\"s\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "(i) The number of oscillation is 4.068 10**6 Hz\n",
+ "(ii) The coherence time is 8e-11 s\n"
+ ]
+ }
+ ],
+ "prompt_number": 65
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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