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+
+
+
+
+
+//given 
+//page no 5
+clc;
+clear;
+//Applying Snell's law
+a=1*sin(428)/1.333;//a=sin(w2)
+printf("Angle of refraction is %0.1f\n ",a)
+printf("\n Angle of refraction is %0.0f degree \n ",asin(a)*57.27)
+c=3*10^8;           //speed of light in m/s
+n2=1.333;           //refractive index of 2nd medium
+v2=c/n2;            //velocity in second medium in m/s
+n1=1;               //refractive index of 1st medium
+l1=620;             //in nm   wavelength
+printf("\n Velocity of optical ray through medium second %0.02f*10^8 m/s\n",v2/10^8);
+l2= (n1*l1)/n2;     //wavelength in 2nd medium in nm
+printf("\n Wavelenght of optical ray through medium second %0.1f nm",l2);       //Result