A gravitational field is observed as both a particle and a wave. The bubble/film collapse at a double slit or concentric slit configuration generates bursts of particles/droplets. The droplets beyond the "invisible" slits can be regarded as dark matter, having the same fluid/gravitational properties of the original particle/wave. 

Bubble: inflated disk (static monopole) > collapsing field/waves > energetic expanding particles


                                             Image of particles projected onto a truncated cone.

                                                         Image of  particles projected onto a cone.

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