1 files changed, 111 insertions, 0 deletions
diff --git a/backup/Modern_Physics_version_backup/Chapter15.ipynb b/backup/Modern_Physics_version_backup/Chapter15.ipynb
new file mode 100755
index 00000000..fc04a916
--- /dev/null
+++ b/backup/Modern_Physics_version_backup/Chapter15.ipynb
@@ -0,0 +1,111 @@
+{
+ "metadata": {
+  "name": "Chapter15"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 15:The General Theory of Relativity"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 15.1, Page 491"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#initiation of variable\n",
+      "w=121.5;   #lambda\n",
+      "G=6.67*10**-11; #Various given values and constants\n",
+      "M= 1.99*10**30; \n",
+      "R= 6.96*10**8;\n",
+      "c=3*10**8;\n",
+      "\n",
+      "#calculation\n",
+      "k= G*M/(R*c**2);    #(delLambda)/(lambda)\n",
+      "delw=k*w;           #del(lambda)\n",
+      "\n",
+      "#result\n",
+      "print \"The change in wavelength due to gravitational shift in pm is\",round(delw*10**3,3);\n",
+      "\n",
+      "#part3\n",
+      "k=5.5*10**-5;#due to thermal Doppler broadening effect\n",
+      "delw=k*w;\n",
+      "\n",
+      "#result\n",
+      "print \"The change in wavelength due to thermal Doppler broadening effect in pm is\",round(delw*10**3,3);"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        " The change in wavelength due to gravitational shift in pm is 0.257\n",
+        "The change in wavelength due to thermal Doppler broadening effect in pm is 6.683\n"
+       ]
+      }
+     ],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example 15.2, Page 501"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#initiation of variable\n",
+      "mp=938.280;   #mass of various particles\n",
+      "me=0.511;\n",
+      "m2h=1875.628;\n",
+      "\n",
+      "#calculation\n",
+      "mic2=2*mp;           #mass energy on L.H.S\n",
+      "mfc2=m2h+me;  #mass energy on R.H.S\n",
+      "Q=mic2-mfc2;    #Q value of reation\n",
+      "pc=Q;\n",
+      "mc2=1875.628;\n",
+      "K=(pc**2)/(2*mc2);     #kinetic threshold energy\n",
+      "Emax=Q-K;        #maximum energy \n",
+      "\n",
+      "#result\n",
+      "print \"The maximum neutrino energy in MeV is\",round(Emax,3);"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The maximum neutrino energy in MeV is 0.421\n"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
+\ No newline at end of file