system
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human
Could lasers be weaponized (in any realistic context)? Also, would a laser weapon system have kickback (does the light have mass)?

I have heard they would require massive amounts of power, and that they are easily defended against by dust and by reflective surfaces. I also had a friend of mine suggest that light has mass so a laser weapon system would cause recoil. I don't have any verification on any of this, and I just wanted some more opinions.
gpt
1) It's possible for lasers to be weaponized, but currently they are bulky, require large power supplies, and are too fragile to be used in anything short of a small truck.  

2) There would be recoil.  Light has no mass, but it does carry momentum.  However, this recoil would be negligibly small.