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diff --git a/Engineering_Physics_by_Bhattacharya_Bhaskaran/Chapter3.ipynb b/Engineering_Physics_by_Bhattacharya_Bhaskaran/Chapter3.ipynb new file mode 100755 index 00000000..4f695418 --- /dev/null +++ b/Engineering_Physics_by_Bhattacharya_Bhaskaran/Chapter3.ipynb @@ -0,0 +1,91 @@ +{ + "metadata": { + "name": "Chapter3" + }, + "nbformat": 3, + "nbformat_minor": 0, + "worksheets": [ + { + "cells": [ + { + "cell_type": "heading", + "level": 1, + "metadata": {}, + "source": "Fibre Optics and Applications" + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 3.1, Page number 84" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the numerical aperture, critical angle,acceptance angle\n\n#importing modules\nimport math\n\n#Variable declaration\nn1 = 1.5; #refractive index of core\nn2 = 1.47; #refractive index of cladding\nn0 = 1; #refractive index of air\na = 180/math.pi; #conversion factor of radian to degree\n\n#Calculation\nNA = math.sqrt((n1**2)-(n2**2)); #numerical aperture\nNA=math.ceil(NA*10)/10; #rounding off to 1 decimal\nalpha_m = math.asin(NA/n0); #acceptance angle(radian)\nalpha_m = alpha_m*a; #acceptance angle(degrees)\nalpha_m=math.ceil(alpha_m*10**2)/10**2; #rounding off to 2 decimals\nphi_m = math.asin(NA/n1); #phase angle(radian)\nphi_m = phi_m*a; #phase angle(degrees)\nphi_m=math.ceil(phi_m*10**2)/10**2; #rounding off to 2 decimals\ntheta_c = math.asin(n2/n1); #critical angle(radian)\ntheta_c = theta_c*a; #critical angle(degrees)\ntheta_c=math.ceil(theta_c*10**3)/10**3; #rounding off to 3 decimals\n\n#Result\nprint \"numerical aperture is\",NA\nprint \"acceptance angle is\",alpha_m,\"degrees\"\nprint \"phase angle is\",phi_m,\"degrees\"\nprint \"critical angle is\",theta_c,\"degrees\"", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "numerical aperture is 0.3\nacceptance angle is 17.46 degrees\nphase angle is 11.54 degrees\ncritical angle is 78.522 degrees\n" + } + ], + "prompt_number": 1 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 3.2, Page number 85" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the pulse broadening \n\n#importing modules\nimport math\n\n#Variable declaration\nn1 = 1.5; #refractive index of core\nn2 = 1.47; #refractive index of cladding\nc = 3*10**8; #velocity of light(m/sec)\n\n#Calculation\ndeltatbyL = (n1/n2)*((n1-n2)/c);\n\n#Result\nprint \"pulse broadening per unit length is\",deltatbyL,\"s/m\"\n", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "pulse broadening per unit length is 1.02040816327e-10 s/m\n" + } + ], + "prompt_number": 2 + }, + { + "cell_type": "heading", + "level": 2, + "metadata": {}, + "source": "Example number 3.3, Page number 85" + }, + { + "cell_type": "code", + "collapsed": false, + "input": "#To calculate the minimum and maximum number of total internal reflections\n\n#importing modules\nimport math\n\n#Variable declaration\nphi_m = 11.54; #phase angle(degrees)\na = 0.5*10**-4;\nx = math.pi/180; #conversion factor from degrees to radians\n\n#Calculation\nphi_m = phi_m*x; #phase angle(radian)\nL = a/math.tan(phi_m); #length(m)\nn = 1/(2*L); #total number of internal reflections(m-1)\n\n#Result\nprint \"rays travelling with alpha = 0 suffer no reflection. therefore minimum number of reflections per metre is 0.\"\nprint \"for rays travelling with alpha = alpha_m, the total number of internal reflections for 1m is\",int(n),\"m-1\"", + "language": "python", + "metadata": {}, + "outputs": [ + { + "output_type": "stream", + "stream": "stdout", + "text": "rays travelling with alpha = 0 suffer no reflection. therefore minimum number of reflections per metre is 0.\nfor rays travelling with alpha = alpha_m, the total number of internal reflections for 1m is 2041 m-1\n" + } + ], + "prompt_number": 4 + }, + { + "cell_type": "code", + "collapsed": false, + "input": "", + "language": "python", + "metadata": {}, + "outputs": [] + } + ], + "metadata": {} + } + ] +}
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