1 files changed, 103 insertions, 0 deletions
diff --git a/Material_Science/material_science_ch_14.ipynb b/Material_Science/material_science_ch_14.ipynb
new file mode 100755
index 00000000..a1ea592c
--- /dev/null
+++ b/Material_Science/material_science_ch_14.ipynb
@@ -0,0 +1,103 @@
+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 14: Luminescence"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 14.1, page no-385"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Penetration depth of electron\n",
+      "\n",
+      "import math\n",
+      "#Variable Declaration\n",
+      "eb=10000.0              # Energy of incident beam in eV\n",
+      "k=1.2*10**-4            # Constant depending on marerial  \n",
+      "b=0.151                 # Constant depending on marerial\n",
+      "e=1.6*10**-19           # charge of an electron\n",
+      "\n",
+      "#Calculation\n",
+      "rc=k*(eb*e)**b\n",
+      "\n",
+      "#Result\n",
+      "print('The penetration depth of the electron is %.4f \u00b5m'%(rc*10**6))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The penetration depth of the electron is 0.6998 \u00b5m\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 14.2, page no-386"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "# Luminescent lifetime\n",
+      "\n",
+      "import math\n",
+      "#Variable Declaration\n",
+      "ed=0.4                   # difference in energy level in eV\n",
+      "e=1.6*10**-19            # Charge of an electron\n",
+      "kT=0.025                 # temperature equivalent \n",
+      "q=10**8                  # constant\n",
+      "\n",
+      "#Calculation\n",
+      "r=q*math.e**(-(ed/kT))\n",
+      "\n",
+      "#Result\n",
+      "print('The escape rate per unit time = %.1f per sec\\nTherefore, the luminescent lifetime is nearly %.0f sec'%(math.floor(r*10)/10,r))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The escape rate per unit time = 11.2 per sec\n",
+        "Therefore, the luminescent lifetime is nearly 11 sec\n"
+       ]
+      }
+     ],
+     "prompt_number": 5
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file