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-{
- "metadata": {
-  "name": "",
-  "signature": "sha256:10e3d0cfbf86d2f1081a9d348d19bd93a499331702a8a9f3c32ddc1a8679292a"
- },
- "nbformat": 3,
- "nbformat_minor": 0,
- "worksheets": [
-  {
-   "cells": [
-    {
-     "cell_type": "heading",
-     "level": 1,
-     "metadata": {},
-     "source": [
-      "Chapter 37 Line Communication"
-     ]
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 37.1 Page no 1007"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Given\n",
-      "U=1.48\n",
-      "U2=1.45\n",
-      "\n",
-      "#Calculation\n",
-      "import math\n",
-      "C=U2/U\n",
-      "C1=math.asin(C)*180/3.14\n",
-      "\n",
-      "#Result \n",
-      "print\"The critical angle for a light is\",round(C1,1),\"degree\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "The critical angle for a light is 78.5 degree\n"
-       ]
-      }
-     ],
-     "prompt_number": 8
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 37.2 Page no 1007"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Given\n",
-      "u=1.7\n",
-      "u2=1.5\n",
-      "\n",
-      "#Calculation\n",
-      "import math\n",
-      "C=u2/u\n",
-      "A=math.asin(C)*180/3.14\n",
-      "I=math.sqrt(u**2-u2**2)\n",
-      "A1=math.asin(I)*180/3.14\n",
-      "\n",
-      "#Result\n",
-      "print\"The critical angle is\",round(A,1),\"degree\"\n",
-      "print\"The angle of acceptance is\",round(A1,1),\"degree\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "The critical angle is 62.0 degree\n",
-        "The angle of acceptance is 53.2 degree\n"
-       ]
-      }
-     ],
-     "prompt_number": 19
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 37.3 Page no 1007"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Given\n",
-      "u1=1.5\n",
-      "u2=1.3\n",
-      "L=30                            #m\n",
-      "c=3*10**8\n",
-      "\n",
-      "#Calculation\n",
-      "import math\n",
-      "V=c/u1\n",
-      "t1=L/V\n",
-      "C=u2/u1\n",
-      "C1=math.asin(C)*180/3.14\n",
-      "x=L/C\n",
-      "t=x/V\n",
-      "\n",
-      "#Result\n",
-      "print\"(a) Time taken for light in axical mode is\",t1*10**7,\"*10**-7 s\" \n",
-      "print\"(b) Time taken for light in highest order mode is\",round(t*10**7,2),\"*10**-7 s\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "(a) Time taken for light in axical mode is 1.5 *10**-7 s\n",
-        "(b) Time taken for light in highest order mode is 1.73 *10**-7 s\n"
-       ]
-      }
-     ],
-     "prompt_number": 49
-    },
-    {
-     "cell_type": "heading",
-     "level": 2,
-     "metadata": {},
-     "source": [
-      "Example 37.5 Page no 1007"
-     ]
-    },
-    {
-     "cell_type": "code",
-     "collapsed": false,
-     "input": [
-      "#Given\n",
-      "a=0.5\n",
-      "b=50.0                              #Km\n",
-      "\n",
-      "#Calculation\n",
-      "import math\n",
-      "A=10*math.log10(a)\n",
-      "B=A/b\n",
-      "\n",
-      "#Result\n",
-      "print\"Attenuation is\", round(B,2),\"dB/Km\""
-     ],
-     "language": "python",
-     "metadata": {},
-     "outputs": [
-      {
-       "output_type": "stream",
-       "stream": "stdout",
-       "text": [
-        "Attenuation is -0.06 dB/Km\n"
-       ]
-      }
-     ],
-     "prompt_number": 54
-    }
-   ],
-   "metadata": {}
-  }
- ]
-}
-\ No newline at end of file