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authorkinitrupti2017-05-12 18:40:35 +0530
committerkinitrupti2017-05-12 18:40:35 +0530
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-{
- "metadata": {
- "celltoolbar": "Raw Cell Format",
- "name": "",
- "signature": "sha256:1b9250434a66c555344f74813ca967ce998b1c86d33424d56ca71d7c748c63ce"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
- {
- "cells": [
- {
- "cell_type": "heading",
- "level": 1,
- "metadata": {},
- "source": [
- "Chapter 1: Interference"
- ]
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 1.7, Page number 1-19"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math \n",
- "#Given Data:\n",
- "i=30 #angle of incidence\n",
- "u=1.43 #Refractive index of a soap film\n",
- "lamda=6*10**-7 #wavelength of light\n",
- "n=1 #For minimum thickness\n",
- "\n",
- "#Calculations:\n",
- "#u=sin i/sin r #Snell's law .So,\n",
- "r=math.degrees(math.asin(math.sin(i)/u)) #angle of reflection\n",
- "\n",
- "#Now, condition of minima in transmitted system is\n",
- "#2ut*cos(r)=(2n-1)lam/2\n",
- "t=lamda/(2*2*u*math.cos(r)) #minimum thickness of film\n",
- "print\"Minimum thickness of film is \",t,\"m\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Minimum thickness of film is 1.09096619878e-07 m\n"
- ]
- }
- ],
- "prompt_number": 17
- },
- {
- "cell_type": "heading",
- "level": 2,
- "metadata": {},
- "source": [
- "Example 1.8, Page number 1-19"
- ]
- },
- {
- "cell_type": "code",
- "collapsed": false,
- "input": [
- "import math\n",
- "#Given Data:\n",
- "\n",
- "lamda = 5893*10**-10 #Wavelength of light\n",
- "theta = 1 #assuming value of theta\n",
- "\n",
- "#We know, B=lam/(2*u*theta). Here u=1\n",
- "B = lamda/(2*theta) #fringe spacing\n",
- "n=20 #interference fringes\n",
- "\n",
- "#Calculations:\n",
- "#t=n*B*tan(theta)\n",
- "t = 20*B*theta #Thickness of wire\n",
- "print\"Thickness of wire is =\",t,\"m\""
- ],
- "language": "python",
- "metadata": {},
- "outputs": [
- {
- "output_type": "stream",
- "stream": "stdout",
- "text": [
- "Thickness of wire is = 5.893e-06 m\n"
- ]
- }
- ],
- "prompt_number": 18
- }
- ],
- "metadata": {}
- }
- ]
-} \ No newline at end of file