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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 9: QUANTUM MECHANICS"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.14: Probability_of_electron_moving_in_1D_box.sci"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Scilab Code Ex9.14: Probability of electron moving in 1D box : Page-207 (2010)\n",
+"a = 2e-010;    // Width of 1D box, m\n",
+"x1 = 0;    // Position of first extreme of the box, m\n",
+"x2 = 1e-010;    // Position of second extreme of the box, m\n",
+"P = integrate('2/a*(sin(2*%pi*x/a))^2', 'x', x1, x2);    // The probability of finding the electron between x = 0 and x = 1e-010\n",
+"printf('\nThe probability of finding the electron between x = 0 and x = 1e-010 = %3.1f', P);\n",
+"\n",
+"// Result\n",
+"// The probability of finding the electron between x = 0 and x = 1e-010 = 0.5 "
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.1: De_broglie_wavelength_of_an_electron_from_accelerating_potential.sci"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Scilab Code Ex9.1: De-broglie wavelength of an electron from accelerating potential : Page-202 (2010)\n",
+"V = 100;    // Accelerating potential for electron, volt\n",
+"lambda = sqrt(150/V)*1e-010;    // de-Broglie wavelength of electron, m\n",
+"printf('\nThe De-Broglie wavelength of electron = %4.2e m', lambda);\n",
+"\n",
+"// Result\n",
+"// The De-Broglie wavelength of electron = 1.22e-010 m "
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.2: De_broglie_wavelength_of_an_electron_from_kinetic_energy.sci"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Scilab Code Ex9.2: De-broglie wavelength of an electron from kinetic energy : Page-203 (2010)\n",
+"e = 1.6e-019;    // Energy equivalent of 1 eV, J/eV\n",
+"h = 6.626e-034;    // Planck's constant, Js\n",
+"m = 9.1e-031;    // Mass of the electron, kg\n",
+"Ek = 10;    // Kinetic energy of electron, eV\n",
+"// Ek = p^2/(2*m), solving for p\n",
+"p = sqrt(2*m*Ek*e);    // Momentum of the electron, kg-m/s\n",
+"lambda = h/p ;    // de-Broglie wavelength of electron from De-Broglie relation, m\n",
+"printf('\nThe de-Broglie wavelength of electron = %4.2e nm', lambda/1e-009);\n",
+"\n",
+"// Result\n",
+"// The de-Broglie wavelength of electron = 3.88e-001 nm "
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.4: Uncertainty_principle_for_position_and_momentum.sci"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Scilab Code Ex9.4: Uncertainty principle for position and momentum: Page-203 (2010)\n",
+"h = 6.626e-034;    // Planck's constant, Js\n",
+"m = 9.1e-031;    // Mass of the electron, kg\n",
+"v = 1.1e+006;    // Speed of the electron, m/s\n",
+"p = m*v;    // Momentum of the electron, kg-m/s\n",
+"dp = 0.1/100*p;    // Uncertainty in momentum, kg-m/s\n",
+"h_bar = h/(2*%pi);    // Reduced Planck's constant, Js\n",
+"// From Heisenberg uncertainty principle,\n",
+"// dx*dp = h_bar/2, solving for dx\n",
+"dx = h_bar/(2*dp);    // Uncertainty in position, m\n",
+"printf('\nThe uncertainty in position of electron = %4.2e m', dx);\n",
+"\n",
+"// Result\n",
+"// The uncertainty in position of electron = 5.27e-008 m "
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.5: Uncertainty_principle_for_energy_and_time.sci"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Scilab Code Ex9.5: Uncertainty principle for energy and time: Page-203 (2010)\n",
+"e = 1.6e-019;    // Energy equivalent of 1 eV, J/eV\n",
+"h = 6.626e-034;    // Planck's constant, Js\n",
+"dt = 1e-008;    // Uncertainty in time, s\n",
+"h_bar = h/(2*%pi);    // Reduced Planck's constant, Js\n",
+"// From Heisenberg uncertainty principle,\n",
+"// dE*dt = h_bar/2, solving for dE\n",
+"dE = h_bar/(2*dt*e);    // Uncertainty in energy of the excited state, m\n",
+"printf('\nThe uncertainty in energy of the excited state = %4.2e eV', dE);\n",
+"\n",
+"// Result\n",
+"// The uncertainty in energy of the excited state = 3.30e-008 eV"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 9.6: Width_of_spectral_line_from_Uncertainty_principle.sci"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// Scilab Code Ex9.6: Width of spectral line from Uncertainty principle: Page-204 (2010)\n",
+"c = 3e+008;    // Speed of light, m/s\n",
+"dt = 1e-008;    // Average lifetime, s\n",
+"lambda = 400e-009;    // Wavelength of spectral line, m\n",
+"// From Heisenberg uncertainty principle,\n",
+"// dE = h_bar/(2*dt) and also dE = h*c/lambda^2*d_lambda, which give\n",
+"// h_bar/(2*dt) = h*c/lambda^2*d_lambda, solving for d_lambda\n",
+"d_lambda = lambda^2/(4*%pi*c*dt);    // Width of spectral line, m\n",
+"printf('\nThe width of spectral line = %4.2e m', d_lambda);\n",
+"\n",
+"// Result\n",
+"// The width of spectral line = 4.24e-015 m "
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}