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+//Example 2_2
+clc();
+clear;
+//Find the difference in angles of deviation in first and third order spectra
+lamda=5000       //units in armstrongs
+lamda=lamda*10^-8             //units in cm
+e=1/6000
+//For first order e*sin(theta1)=1*lamda
+theta1=asin(lamda/e)   //units in radians
+theta1=theta1*180/%pi   //units in degrees
+printf("For First order spectra theta1=%.1f degrees",theta1)
+//For third order e*sin(theta3)=3*lamda
+theta3=asin(3*lamda/e)   //units in radians
+theta3=theta3*180/%pi   //units in degrees
+printf("\nFor Third order spectra theta3=%.1f degrees",theta3)
+diffe=theta3-theta1       //units in degrees
+printf("\nDifference in Angles of deviation in first and third order spectra is theta3-theta1=%.2fdegrees",diffe)