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{
"metadata": {
"name": ""
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 6: Classification of solids"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 6.1, page no-143"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"# Wavelength of light emitted from LED\n",
"\n",
"import math\n",
"#variable declaration\n",
"e=1.609*10**-19 # charge of an electron\n",
"eg=1.8 # energy band gap\n",
"h=6.626*10**-34 # Planck's constant\n",
"c=3*10**8 # speed of light\n",
"\n",
"\n",
"#calculation\n",
"E=e*eg\n",
"lamda=h*c/E\n",
"\n",
"#Result\n",
"print('The wavelength of light emitted from given LED is %.3f \u00b5m'%(lamda*10**7))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The wavelength of light emitted from given LED is 6.863 \u00b5m\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example 6.2, page no-144"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Band gap of given GaAsP\n",
"\n",
"import math\n",
"#variable declaration\n",
"lam=6715*10**-10 # wavelength of greenlight from mercury lamp\n",
"h=6.626*10**-34 # planck's constant\n",
"c=3*10**8 # speed of light\n",
"e=1.6*10**-19 # charge of an electron\n",
"\n",
"#calculation\n",
"Eg=h*c/lam\n",
"Eg=Eg/e\n",
"\n",
"#Result\n",
"print('The band gap of the given GaAsP is %.1f eV'%(math.floor(Eg*10)/10))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"The band gap of the given GaAsP is 1.8 eV\n"
]
}
],
"prompt_number": 5
}
],
"metadata": {}
}
]
}
|
