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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# 1: Atomic Spectra"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example number 1, Page number 42"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"wavelength separation is 0.168 angstrom\n",
"answer in the book is wrong\n"
]
}
],
"source": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration \n",
"e=1.6*10**-19; #charge(coulomb)\n",
"B=1; #flux density(Wb/m**2)\n",
"lamda=6000*10**-10; #wavelength(m)\n",
"m0=9.1*10**-31; #mass(kg)\n",
"c=3*10**8; #velocity of light(m/sec)\n",
"\n",
"#Calculations\n",
"d_lamda=B*e*(lamda**2)/(4*math.pi*m0*c); #wavelength separation(m)\n",
"d_lamda=d_lamda*10**10; #wavelength separation(angstrom)\n",
"\n",
"#Result\n",
"print \"wavelength separation is\",round(d_lamda,3),\"angstrom\"\n",
"print \"answer in the book is wrong\""
]
},
{
"cell_type": "markdown",
"metadata": {
"collapsed": true
},
"source": [
"## Example number 2, Page number 42"
]
},
{
"cell_type": "code",
"execution_count": 11,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"magnetic field is 5.89 *10**-2 tesla\n"
]
}
],
"source": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration \n",
"h=6.6*10**-34; #planck's constant\n",
"delta_v=8.3*10**8; #frequency separation(Hz)\n",
"mewB=9.3*10**-24; #magnetic moment\n",
"\n",
"#Calculations\n",
"B=h*delta_v/mewB; #magnetic field(tesla)\n",
"\n",
"#Result\n",
"print \"magnetic field is\",round(B*10**2,2),\"*10**-2 tesla\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example number 3, Page number 42"
]
},
{
"cell_type": "code",
"execution_count": 14,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"ratio of charge to mass of electron is 1.753 *10**11 coulomb/kg\n",
"answer in the book varies due to rounding off errors\n"
]
}
],
"source": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration \n",
"dv=120*10**6; #frequency(Hz)\n",
"B=8.6*10**-3; #flux density(T)\n",
"\n",
"#Calculations\n",
"r=4*math.pi*dv/B; #ratio of charge to mass of electron(coulomb/kg)\n",
"\n",
"#Result\n",
"print \"ratio of charge to mass of electron is\",round(r/10**11,3),\"*10**11 coulomb/kg\"\n",
"print \"answer in the book varies due to rounding off errors\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example number 4, Page number 42"
]
},
{
"cell_type": "code",
"execution_count": 18,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"the three wavelengths are 4226.4 angstrom 4226.73 angstrom 4227.06 angstrom\n",
"answers for wavelengths given in the book are wrong\n"
]
}
],
"source": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration \n",
"e=1.6*10**-19; #charge(coulomb)\n",
"B=4; #flux density(Wb/m**2)\n",
"lamda=4226.73*10**-10; #wavelength(m)\n",
"m0=9.1*10**-31; #mass(kg)\n",
"c=3*10**8; #velocity of light(m/sec)\n",
"\n",
"#Calculations\n",
"d_lamda=B*e*(lamda**2)/(4*math.pi*m0*c); #wavelength separation(m)\n",
"d_lamda=round(d_lamda*10**10,2); #wavelength separation(angstrom)\n",
"l1=(lamda*10**10)-d_lamda;\n",
"l2=lamda*10**10;\n",
"l3=(lamda*10**10)+d_lamda; #three wavelengths\n",
"\n",
"#Result\n",
"print \"the three wavelengths are\",l1,\"angstrom\",l2,\"angstrom\",l3,\"angstrom\"\n",
"print \"answers for wavelengths given in the book are wrong\""
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example number 5, Page number 43"
]
},
{
"cell_type": "code",
"execution_count": 21,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"ratio of charge to mass of electron is 1.75 *10**11 C/kg\n"
]
}
],
"source": [
"#importing modules\n",
"import math\n",
"from __future__ import division\n",
"\n",
"#Variable declaration \n",
"dlamda=0.0116*10**-9; #frequency(m)\n",
"B=1; #flux density(T)\n",
"lamda=500*10**-9; #wavelength(m)\n",
"c=3*10**8; #velocity of light(m/sec)\n",
"\n",
"#Calculations\n",
"r=4*math.pi*c*dlamda/(B*lamda**2); #ratio of charge to mass of electron(coulomb/kg)\n",
"\n",
"#Result\n",
"print \"ratio of charge to mass of electron is\",round(r/10**11,2),\"*10**11 C/kg\""
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 2",
"language": "python",
"name": "python2"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
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"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.11"
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|
