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{
"metadata": {
"name": "",
"signature": "sha256:7c85091bd4e24d60bc3e76c728778479287ddcc4fa6749b5ce2d1adbd2e10621"
},
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"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"8: Maxwell's equations"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 8.1, Page number 234"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"K=4.3; #dielectric constant\n",
"c=3*10**8; #velocity of light in vacuum\n",
"\n",
"#Calculation\n",
"n=round(math.sqrt(K),2); #refractive index of quartz\n",
"v=c/n; #velocity of light in quartz(m/s)\n",
"\n",
"#Result\n",
"print \"refractive index of quartz is\",n\n",
"print \"velocity of light in quartz is\",round(v/10**8,2),\"*10**8 m/s\"\n",
"print \"answer for velocity given in the book is wrong\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"refractive index of quartz is 2.07\n",
"velocity of light in quartz is 1.45 *10**8 m/s\n",
"answer for velocity given in the book is wrong\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 8.2, Page number 235"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"epsilon0=8.87*10**-12; #dielectric permittivity of free space\n",
"E=1.2*10**6; #electric field intensity(N/C)\n",
"\n",
"#Calculation\n",
"Ed=(1/2)*epsilon0*(E**2); #energy density(J/m**2)\n",
"\n",
"#Result\n",
"print \"energy density is\",round(Ed,3),\"J/m**2\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"energy density is 6.386 J/m**2\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 8.3, Page number 235"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"E0=3*10**6; #dielectric voltage(V/m)\n",
"c=3*10**8; #velocity of light in vacuum\n",
"mew0=4*math.pi*10**-7; \n",
"\n",
"#Calculation\n",
"Av=(E0**2)/(2*c*mew0); #average value of Poynting vector(W/m**2)\n",
"\n",
"#Result\n",
"print \"average value of Poynting vector is\",round(Av/10**11,2),\"*10**11 W/m**2\"\n",
"print \"answer given in the book is wrong\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"average value of Poynting vector is 0.12 *10**11 W/m**2\n",
"answer given in the book is wrong\n"
]
}
],
"prompt_number": 13
}
],
"metadata": {}
}
]
}
|
