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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 5: Light"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.1: minimum_deviation.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//INPUT DATA\n",
+"np=1.39 //refractive index of prism\n",
+"nl=1.29 //refractive index of liquid\n",
+"a=62 //refracting angle of prism\n",
+"//calculation\n",
+"x=np*sind(62/2)/nl//snells law\n",
+"y=asind(x)\n",
+"d=(y*2)-a//minimum deviation\n",
+"//output\n",
+"printf('the minimum deviation is %3.3f degree',d)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.2: incidence_and_prism_angle.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//INPUT DATA\n",
+"np=1.39 //refractive index in air\n",
+"a=62 //refracting angle of prism\n",
+"//calculation\n",
+"x=1/np\n",
+"c=asind(x)//critical angle\n",
+"r=a-c\n",
+"i= np* sind(r)//snells law\n",
+"i1=asind(i)\n",
+"A=2*c//greatest prism angle allowing refraction\n",
+"//output\n",
+"printf('angle of incidence producing maximum deviation is %3.3f deg',r)\n",
+"printf(' \n greatest prism angle allowing refraction is %3.3f deg',A)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.3: position_and_nature_of_image.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"f=0.15 //focal length\n",
+"u=0.2 //distance of object\n",
+"//calculation\n",
+"x=(1/-f)-(1/u)//lens formula\n",
+"y=1/x\n",
+"m=y/u//linear magnification\n",
+"//output\n",
+"printf('the position of image is %3.3f m',y)\n",
+"printf('\n linear magnification is %3.3f hence image is diminished',m)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.4: position_of_image.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"f1=0.25 //focal length of diverging lens\n",
+"f2=0.2 //focal length of converging lens\n",
+"//calculation\n",
+"x=(1/-f1)+(1/f2)//lens formula\n",
+"y=1/x\n",
+"a=(1/y)-(1/0.15)//lens formula\n",
+"b=1/a\n",
+"//output\n",
+"printf('the position of image is %3.3f m hence the image is virtual',b)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.5: position_and_nature_of_image.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"f=0.5 //focal length \n",
+"u=0.8 //distance of object \n",
+"f1=0.2 //focal length of converging lens\n",
+"d=1 //distance behind the first lens\n",
+"//calculation\n",
+"x=(1/f)-(1/u)//lens formula\n",
+"y=1/x\n",
+"u1=-(y-d)//second lens \n",
+"a=1/f1 +(1/-u1)//lens formula\n",
+"b=1/a\n",
+"//output\n",
+"printf('the image lies %3.3f m behind second lens',b)\n",
+"printf('\n the image is %3.3f  m behind first lens',b+d)"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 5.6: lens_values.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"clc\n",
+"clear\n",
+"//input\n",
+"F=5 //power of lenses\n",
+"f1=0.45 //focal length\n",
+"//calculation\n",
+"x=F-(1/f1)//lens formula\n",
+"f2=1/x\n",
+"//output\n",
+"printf('the focal length is %3.3f m',f2)\n",
+"printf('\n the power is %3.3f dioptre',x)"
+   ]
+   }
+],
+"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
+}