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+//Chapter 1 : Wave Optics
+
+clear;
+
+//Variable declaration
+lamda1=6000*10**-8           
+lamda2=4500*10**-8
+R=90                 //Radius of curvature
+n=3
+
+//Calculation
+dn=sqrt(4*n*lamda1*R)
+
+//Result
+mprintf("Diameter of the nth ring= %0.4f cm" ,dn)
+