Quote: "on some science show i saw a gun that guided bullets with a laser."
Actually those were probably missiles.
A missile produces its own thrust and can therefore manipulate its trajectory.
A bullet is a simple projectile that has no way to alter its own direction other than wind deflection.
This is arguable though, since traditional definitions include bullets as missiles.
However, most of those definitions were made before the advent of rocket propulsion.
In my world though, a bullet does not produce its own momentum.
The cartridge has the powder but that stays in the chamber of the weapon.
The bullet itself is just a hunk of metal.
Missiles were first guided by lasers in the 1980's during Reagans administration.
The budget was for the "Star Wars" program, which supposedly would destroy nuclear weapons in route via a laser shot from a satellite.
Gotta love the cold war.
In actuality it was a front for a plane that could shoot them down using a laser tracking device that was in the nose, but all of that was top secret. The plane used 3 lasers, 1 for detection, 1 for tracking, and one for penetrating the missile's hull.
