Most realistic method of creating a city-sized visible force field
It seems to be a really common trope in futuristic movies to have visible force fields, but based on a couple questions, it seems like it's not all too realistic to create a small force field (size of a doorway) due to the amount of energy taken. However, I was hoping to take a different look at this concept.
In the Avengers series, we see Wakanda sporting a large-scale, but not as powerful force field surrounding the entire city. At first glance, this seems largely impossible due to the amount of energy required to create a small field, but I think the metrics could be somewhat changed in this scenario. During the battle in Wakanda, it seems like the power of the force fields is somewhat weaker than the average force field, as there appear to be Outriders (bear-sized dogs?) that can push through the force field with enough power. 922
Additionally, assuming that Wakanda's vibranium supply could be replaced with a realistic nuclear power plant, it seems like it would be within the realm of possibility.
One minor detail seen in the film, as well, is that there seem to be divisions of force fields, where some sectors can specifically be unlocked. This could lead to a theory that there are invisible force field emitters bordering each of these sectors, if that happens to help.
I'm wondering if it's possible to create the kind of force fields seen in this film, and if it's not possible, what relative scale would be more feasible (size of a small house, size of a person, etc.). As far as requirements for the field:
* I was hoping for it specifically to be mostly translucent (color doesn't matter, but should not be completely invisible or completely opaque).
* Field should produce electrical energy that's applied to a person on contact (doesn't have to be electrical arcs) rather than just proximity.
* As for strength, I'm fine with it being relatively weak, but it should somewhat hinder small-arms fire/organic creatures from passing through.
Not particularly sure if this fits the hard-science tag, so I'm leaving it as science-based. Thanks for reading, y'all! 477