Laser

I'm curious if there's a lore explanation to why lasers would have recoil. Exactly how do they work? Are they bouncing the beam off mirrors where the photons could possibly contribute to the mass of the weapon? Or is there no explanation of this and it's just a game balancing mechanic to prevent these weapons from being overpowered? Someone thought about the real world physics at Bethesda. They made laser beams have no mass as they cannot disrupt any movable objects. Bullets, plasma, explosives, and the radiation from the gamma gun will all move objects. Lasers are the only weapon that can't. Not trying to debate about why lasers have no recoil. I just want to know if there's some little known lore about how these weapons function where they some could create kick