From 6279fa19ac6e2a4087df2e6fe985430ecc2c2d5d Mon Sep 17 00:00:00 2001 From: kinitrupti Date: Fri, 12 May 2017 18:53:46 +0530 Subject: Removed duplicates --- .../Chapter15_1.ipynb | 203 --------------------- 1 file changed, 203 deletions(-) delete mode 100755 backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter15_1.ipynb (limited to 'backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter15_1.ipynb') diff --git a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter15_1.ipynb b/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter15_1.ipynb deleted file mode 100755 index 48af1473..00000000 --- a/backup/Modern_Physics_By_G.Aruldas_version_backup/Chapter15_1.ipynb +++ /dev/null @@ -1,203 +0,0 @@ -{ - "metadata": { - "name": "", - "signature": "sha256:ede2b0bb266c67744fbe14f69a09ec9b5592c13400e7d0bf2db5fa598ebe9db1" - }, - "nbformat": 3, - "nbformat_minor": 0, - "worksheets": [ - { - "cells": [ - { - "cell_type": "heading", - "level": 1, - "metadata": {}, - "source": [ - "15: Lasers" - ] - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 15.1, Page number 283" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "k=1.38*10**-23; #boltzmann constant(J/K)\n", - "T=1000; #temperature(K)\n", - "new1=7.5*10**14; \n", - "new2=4.3*10**14;\n", - "h=6.626*10**-34; #planck's constant(Js)\n", - "\n", - "#Calculation\n", - "kT=k*T;\n", - "#optical region extends from 4000 to 7000 angstrom\n", - "hnew=h*(new1-new2); \n", - "\n", - "#Result\n", - "print \"value of kT is\",kT,\"J\"\n", - "print \"value of hnew is\",hnew,\"J\"\n", - "print \"hnew>kT.therefore spontaneous transitions are dominant ones in optical region\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "value of kT is 1.38e-20 J\n", - "value of hnew is 2.12032e-19 J\n", - "hnew>kT.therefore spontaneous transitions are dominant ones in optical region\n" - ] - } - ], - "prompt_number": 3 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 15.2, Page number 298" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "h=6.626*10**-34; #planck's constant(Js)\n", - "c=3*10**8; #velocity of light(m/sec)\n", - "P=0.6; #power(watt)\n", - "T=30*10**-3; #time(s)\n", - "lamda=640*10**-9; #wavelength(m)\n", - "\n", - "#Calculation\n", - "E=P*T; #energy deposited(J)\n", - "n=E*lamda/(h*c); #number of photons in each pulse\n", - "\n", - "#Result\n", - "print \"energy deposited is\",E,\"J\"\n", - "print \"number of photons in each pulse is\",round(n/10**16,1),\"*10**16\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "energy deposited is 0.018 J\n", - "number of photons in each pulse is 5.8 *10**16\n" - ] - } - ], - "prompt_number": 6 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 15.3, Page number 298" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "lamda=5000*10**-10; #wavelength(m)\n", - "f=0.2; #focal length(m)\n", - "a=0.009; #radius of aperture(m)\n", - "P=2.5*10**-3; #power(W)\n", - "\n", - "#Calculation\n", - "A=math.pi*lamda**2*f**2/a**2; #area of spot at focal plane(m**2)\n", - "I=P/A; #intensity at focus(W/m**2)\n", - "\n", - "#Result\n", - "print \"area of spot at focal plane is\",round(A*10**10,2),\"*10**-10 m**2\"\n", - "print \"intensity at focus is\",round(I/10**6,3),\"*10**6 W/m**2\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "area of spot at focal plane is 3.88 *10**-10 m**2\n", - "intensity at focus is 6.446 *10**6 W/m**2\n" - ] - } - ], - "prompt_number": 11 - }, - { - "cell_type": "heading", - "level": 2, - "metadata": {}, - "source": [ - "Example number 15.4, Page number 298" - ] - }, - { - "cell_type": "code", - "collapsed": false, - "input": [ - "#importing modules\n", - "import math\n", - "from __future__ import division\n", - "\n", - "#Variable declaration\n", - "lamda=693*10**-9; #wavelength(m)\n", - "D=3*10**-3; #diameter of mirror(m)\n", - "d=300*10**3; #distance from earth(m)\n", - "\n", - "#Calculation\n", - "delta_theta=1.22*lamda/D; #angular spread(rad)\n", - "a=delta_theta*d; #diameter of beam on satellite(m)\n", - "\n", - "#Result\n", - "print \"angular spread is\",round(delta_theta*10**4,2),\"*10**-4 rad\"\n", - "print \"diameter of beam on satellite is\",round(a,2),\"m\"" - ], - "language": "python", - "metadata": {}, - "outputs": [ - { - "output_type": "stream", - "stream": "stdout", - "text": [ - "angular spread is 2.82 *10**-4 rad\n", - "diameter of beam on satellite is 84.55 m\n" - ] - } - ], - "prompt_number": 15 - } - ], - "metadata": {} - } - ] -} \ No newline at end of file -- cgit