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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