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+//Chapter-1,Example 1_13,Page 1-41
+clc()
+
+//Given Data:
+
+B=0.25*10^-2             //fringe spacing
+lam=5.5*10^-7            //Wavelength of light
+u=1.4                    //Refractive index of wedge
+
+//Calculations:
+//We know, B=lam/(2*u*theta).
+theta1=lam/(2*u*B)          //angle of wedge in radians
+theta=theta1*3600*180/%pi   //angle of wedge in seconds
+printf('Angle of wedge is =%.1f seconds',theta)