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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 24:Interference and Diffraction"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Ex24.1:pg-1130"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The angle at which the reinforcement line occurs is theta2= 44.0 degrees\n"
]
}
],
"source": [
" #Example 24_1\n",
"import math \n",
" \n",
" #To find the angle at which the reinforcement line occurs\n",
"n=2 #units in constant\n",
"lamda=0.7 #units in cm\n",
"d=2 #units in cm\n",
"theta2=math.asin((n*lamda)/d)*180/math.pi #Units in degrees\n",
"print \"The angle at which the reinforcement line occurs is theta2=\",round(theta2),\" degrees\"\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Ex24.2:pg-1131"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The thickness of air gap increases by= 294.0 nm\n"
]
}
],
"source": [
" #Example 24_2\n",
"import math \n",
" \n",
" #To find by how much does thickness of air gap increases\n",
"lamda=589 #units in nm\n",
"gap=round(lamda/2) #units in nm\n",
"print \"The thickness of air gap increases by=\",round(gap),\" nm\"\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Ex24.3:pg-1132"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The thickness that should be coated for minimum reflection is L= 99.6 nm\n"
]
}
],
"source": [
" #Example 24_3\n",
"import math \n",
" \n",
" #To find the thickness that should be coated for minimum reflection\n",
"lamda=550 #units in nm\n",
"n=1.38 #units in constant\n",
"L=(lamda/2)/(2*n) #units in nm\n",
"print \"The thickness that should be coated for minimum reflection is L=\",round(L,1),\" nm\"\n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Ex24.4:pg-1133"
]
},
{
"cell_type": "code",
"execution_count": 10,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"For the first order theta1= 32.0 degrees\n",
"For the second order theta2= 53.0 degrees\n",
"\n",
" As it is impossible for the sine of angle that is= 1.18 radians to be greater that unity this second order and higher order images doesnot exist\n"
]
}
],
"source": [
" #Example 24_4\n",
"\n",
"import math \n",
" \n",
"#To find out the angle at which the line appears\n",
"line=5.89*10**-7 #Units in meters\n",
"noline=1/10.0**6 #units in Lines per meter\n",
"theta1=math.sin(line/noline)*180/math.pi #units in degrees\n",
"#For second order\n",
"theta2=math.sin(2*line/noline)*180/math.pi #units in degrees\n",
"print \"For the first order theta1=\",round(theta1),\" degrees\\nFor the second order theta2=\",round(theta2),\" degrees\"\n",
"sinevalue=2*line/noline #units in radians\n",
"print \"\\n As it is impossible for the sine of angle that is=\",round(sinevalue,2),\" radians to be greater that unity this second order and higher order images doesnot exist\"\n"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 2",
"language": "python",
"name": "python2"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 2
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.11"
}
},
"nbformat": 4,
"nbformat_minor": 0
}
|
