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+
+//Variable declaration
+lamda=500*10**-9; //wavelength(m)
+D=2; //diameter(m)
+beta=(5/100)*10**-2; //fringe width(m)
+
+//Calculation
+d=lamda*D/beta; //separation between slits(m)
+
+//Result
+printf('separation between slits is %0.3f mm \n',int(d*10**3)) \ No newline at end of file