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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:2c7fa5f48e2180e437af8892520159f12789c250e22a9e424719ad83f83b7fff"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "Chapter6-Properties of Light"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex1-pg124"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "\n",
-      "##Example 6.1\n",
-      "##Optical path calculation \n",
-      "\n",
-      "##given values\n",
-      "n=1.33;##refractive index of medium\n",
-      "x=.75;##geometrical path in micrometre\n",
-      " ##calculation\n",
-      "y=x*n;##\n",
-      "print'%s %.3f %s'%('optical path  (in micrometre) is:',y,'')\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "optical path  (in micrometre) is: 0.998 \n"
-       ]
-      }
-     ],
-     "prompt_number": 1
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Ex2-pg137"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "\n",
-      "##Example 6.2\n",
-      "##Coherence length calculation \n",
-      "\n",
-      "##given values\n",
-      "l=1*10**-14.;##line width in metre\n",
-      "x=10.6*10**-6.;##IR emission wavelength in metre\n",
-      " ##calculation\n",
-      "y=x**2./l;##\n",
-      "print'%s %.1f %s'%('coherence length(in metre) is:',y,'')\n"
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "coherence length(in metre) is: 11236.0 \n"
-       ]
-      }
-     ],
-     "prompt_number": 2
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file