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{
"metadata": {
"name": "",
"signature": "sha256:56faf14394c3ea1277cb1f85c7bc70faefc404ada370b067ab1e7cf4d70ea9ba"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 16 :\n",
"Superconductivity and\n",
"Superconducting Materials"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 16.1 Page No : 551"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\t\t\t\n",
"import math \n",
"\n",
"# Variables\n",
"T_c = 4.2;\t\t\t#critical temperature of mercury\n",
"k = 1.4*10**(-23);\t\t\t#\n",
"e = 1.6*10**(-19);\t\t\t#charge on the electron \n",
"\n",
"# Calculation\n",
"E_g = 3*k*T_c;\t\t\t#energy gap (in Joule)\n",
"E = E_g/e;\t\t\t#energy gap (in electron volt)\n",
"h = 6.6*10**(-34)\t\t\t# in J-s\n",
"c = 3*10**8;\t\t\t#in m/s\n",
"wavelength = h*c/E_g;\t\t\t#wavelength of a photon (in m)\n",
"\n",
"# Results\n",
"print 'energy gap = %.1e ev'%E\n",
"print 'wavelength of a photon = %.1e m'%wavelength\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"energy gap = 1.1e-03 ev\n",
"wavelength of a photon = 1.1e-03 m\n"
]
}
],
"prompt_number": 1
}
],
"metadata": {}
}
]
}
|
