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+clc
+//Given that
+x_n=1.88// fringe separation of nth fringe from central fringe in cm 
+N=20// order of fringe
+beta=0.02//fringe width in cm
+D=120// separation between source and eyepiece in cm
+d=0.076// separation between sources in cm 
+//Sample Problem 5 Page No. 47
+printf ("\n # Problem 5 # \n")
+printf (" \n Standard formula used \n   beta= lambda*D/d \n")
+beta=x_n/N // calculation of angle formed
+lambda=d*beta/D*1e8 // calculation of Wavelength of light
+printf ("\n Wavelength of light used is %d Angstrom.", lambda)