I'm trying to simulate the Fraunhoffer diffraction at slits(single,double,triple) with Mathematica.
The question is, why does it oscilate on the numerical result? Or does it occurs in reality? If so, what is the mechanism or principle of the occurrence of the oscillation even though the analytic solution is smooth?
The mathematica source file is here.
The slit size is 50um.
I don't think it is the sampling problem, because when I changed the sampling number 500 to 5000, the oscillation was still exist.