i don't know, they are some sort of luminary and certain things indicate they are not solid objects. possibly electromagnetic or cymatics (sound+water).    double slit was done by young in 1801 to demonstrate and prove huygens wave theory of light. this wave theory was used to figure out all the maxwell heavyside equations. to try to explain experiments like michaelson's and many others einstein and the royal society had to first argue light as a particle. so they introduced particle wave duality. and space time duality. and a host of other nonsense
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