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+//Example 2_16
+clc();
+clear;
+//To find the angular separation of two lines of sodium in the first order spectrum
+N=5*10^5 //units in lines per meter
+m=1
+lemda1=5890*10^-10 //units in meters
+lemda2=5896*10^-10 //units in meters
+theta1=asin(m*N*lemda1)*180/%pi
+theta2=asin(m*N*lemda2)*180/%pi
+theta=(theta2-theta1)
+printf("The angular separation is %.3f degrees",theta)