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{
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"name": "",
"signature": "sha256:b66ce97b080f93d72d0e47d146c1f1e700139df6e3e90b6b5ae82aab3595beed"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"7: Wave and Quantum Mechanics"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 7.1, Page number 192"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"h = 6.625*10**-34; #planck's constant(J sec)\n",
"m1 = 6*10**24; #mass of earth(kg)\n",
"v1 = 3*10**4; #orbital speed(m/sec)\n",
"m2 = 10**-30; #mass of electron(kg)\n",
"v2 = 10**6; #velocity of electron(m/sec)\n",
"\n",
"#Calculation\n",
"lamdaE = h/(m1*v1); #wavelength of a wave(m)\n",
"lamdae = h/(m2*v2); #wavelength of electron(m)\n",
"\n",
"#Result\n",
"print \"wavelength of a wave is\",round(lamdaE/1e-63,2),\"*10**-63 m\"\n",
"print \"wavelength of electron is\",lamdae,\"m\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"wavelength of a wave is 3.68 *10**-63 m\n",
"wavelength of electron is 6.625e-10 m\n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 7.2, Page number 193"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"m = 1; #mass of particle(g)\n",
"v = 100; #velocity of particle(m/sec)\n",
"h = 6.625*10**-34; #planck's constant(J sec)\n",
"\n",
"#Calculation\n",
"m = m*10**-3; #mass of particle(kg)\n",
"lamda = h/(m*v); #wavelength of particle(m)\n",
"\n",
"#Result\n",
"print \"wavelength of particle is\",lamda,\"m\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"wavelength of particle is 6.625e-33 m\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example number 7.3, Page number 193"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration\n",
"V = 200; #potential difference(V)\n",
"\n",
"#Calculation\n",
"lamda = 12.28/math.sqrt(V); #de Broglie wavelength(angstrom)\n",
"lamda = math.ceil(lamda*10**4)/10**4; #rounding off to 4 decimals\n",
"\n",
"#Result\n",
"print \"de Broglie wavelength of electron is\",lamda,\"angstrom\"\n",
"print \"answer given in the book varies due to rounding off errors\""
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"de Broglie wavelength of electron is 0.8684 angstrom\n",
"answer given in the book varies due to rounding off errors\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
|
