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+//given 
+//page no 5 
+clc;
+clear;
+n1=1;                   //refractive index of air
+n2=1.56;                //refractive index of medium
+w1=60;      //in deg C
+//using snell's law
+a= n1*sind(w1)/n2;             //a=sin(w1)
+w2=asind(a);                   //in degree
+printf("Angle of refraction is %0.2f degree\n ",w2);
+B=w1-w2;                         //in degree
+printf("Angle of deviation is %0.1f degree\n ",B)
+// The answer doesn't match because of priting errorsin calculation as sin(608)