I remember reading on wikipedia that an accelerating charged particle radiates em field, but an observer falling onto the ground doesn't see em field from a mot

I remember reading on wikipedia that an accelerating charged particle radiates em field, but an observer falling onto the ground doesn't see em field from a motionless particle and that this puzzle has no explanation today. In the doubleslit experiment, can it be that the two slits set up magnetic or gravitational field that creates the interference pattern and photons are just a method to observe that pattern? Just like iron dust is used to see the magnetic lines that would exist regardless.