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{
"metadata": {
"name": "",
"signature": "sha256:17722fc50855830105e8bbc1d5e7f4e9c2450186689d4bcffcae55541cf58a10"
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"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": {}
}
]
}
|
