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 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "4: Fiber Optics"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example number 4.1, Page number 126"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#importing modules\n",
      "import math\n",
      "from __future__ import division\n",
      "\n",
      "#Variable declaration\n",
      "mew = 1.5;          #refractive angle for glass\n",
      "\n",
      "#Calculation\n",
      "ip = math.atan(mew);         #brewster's angle(radian)\n",
      "ip = ip*180/math.pi;         #brewster's angle(degree)\n",
      "ip = math.ceil(ip*100)/100;   #rounding off to 2 decimals\n",
      "r = 90-ip;        #angle of refraction(degree)\n",
      "r = math.ceil(r*10)/10;   #rounding off to 1 decimal\n",
      "\n",
      "#Result\n",
      "print \"brewster's angle is\",ip,\"degrees\"\n",
      "print \"angle of refraction is\",r,\"degrees\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "brewster's angle is 56.31 degrees\n",
        "angle of refraction is 33.7 degrees\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example number 4.2, Page number 126"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#importing modules\n",
      "import math\n",
      "from __future__ import division\n",
      "\n",
      "#Variable declaration\n",
      "mew0 = 1.658;         #refractive index of calcite\n",
      "mew_layer = 1.550;    #refractive index of canada balsam\n",
      "\n",
      "#Calculation\n",
      "sinC = mew_layer/mew0;       \n",
      "C = math.asin(sinC);         #critical angle(radian)\n",
      "C = C*180/math.pi;           #critical angle(degrees)\n",
      "i = 90-C;              #maximum possible inclination(degrees)\n",
      "i = math.ceil(i*10)/10;   #rounding off to 1 decimal\n",
      "\n",
      "#Result\n",
      "print \"maximum possible inclination is\",i,\"degrees\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "maximum possible inclination is 20.8 degrees\n"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example number 4.3, Page number 126"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#importing modules\n",
      "import math\n",
      "from __future__ import division\n",
      "\n",
      "#Variable declaration\n",
      "mew0 = 1.544;         #refractive index of calcite\n",
      "mewe = 1.533;    #refractive index of canada balsam\n",
      "lamda = 5000;          #wavelength(angstrom)\n",
      "\n",
      "#Calculation\n",
      "lamda = lamda*10**-10;         #wavelength(m)\n",
      "t = lamda/(2*(mew0-mewe));         #thickness of half wave plate(m)\n",
      "t = t*10**4;\n",
      "t = math.ceil(t*10**4)/10**4;   #rounding off to 4 decimals\n",
      "\n",
      "#Result\n",
      "print \"thickness of half wave plate is\",t,\"*10**-4 m\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "thickness of half wave plate is 0.2273 *10**-4 m\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example number 4.4, Page number 126"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#importing modules\n",
      "import math\n",
      "from __future__ import division\n",
      "\n",
      "#Variable declaration\n",
      "l = 20;        #length of glass tube(cm)\n",
      "theta = 26.2;       #polarisation angle(degrees)\n",
      "s = 20;          #weight of sugar(gm)\n",
      "w = 100;        #quantity of water(ml)\n",
      "\n",
      "#Calculation\n",
      "l = l/10;         #length of glass tube(dm)\n",
      "C = s/w;          #concentration(gm/cc)\n",
      "S = theta/(l*C);        #specific rotation(degrees per dm per(gm/cc))\n",
      "\n",
      "#Result\n",
      "print \"specific rotation of sugar is\",S,\"degrees per dm per(gm/cc)\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "specific rotation of sugar is 65.5 degrees per dm per(gm/cc)\n"
       ]
      }
     ],
     "prompt_number": 16
    }
   ],
   "metadata": {}
  }
 ]
}