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"You know, I have one simple request. And that is to have sharks with frickin' laser beams attached to their heads! Now evidently my cycloptic colleague tells me that that can't be done. Are you forgetting what I pay you people for? Honestly, throw me a bone here."
Dr. Evil, Austin Powers: International Man of Mystery

The most prominent type of Ray Gun these days.

When you turn on a Laser Sight, it immediately shows up on your target. This is because it's a laser and moves at the speed of light. So wouldn't you think a laser weapon would also (effectively) immediately hit the target? Logically, yes; but this is TV, where Hollywood Science rules. Thus, energy weapons move a lot slower than the speed of light (and a lot slower than bullets in the same show) and can be dodged after they are fired. Occasionally, it's explained by the dodger seeing the person aiming at them and going for the trigger, and moving in the split-second before they pull it. Also don't expect the lasers to do more than make victims stumble backwards a few feet, unless of course the targets are inhuman or just really not all that important.

Speaking of knockback, an Energy Weapon in fiction will always have recoil and knockback, in spite of the fact that energy (light, electricity, radio, etc.) has negligible momentum. Finally, regardless of a laser's frequency and the medium it's shooting through, it will make futuristic *zap* noises and be visible (and glowy.)

Most of the complaints about laser weapons not behaving like real lasers are because their primary function in TV are not to be realistic depictions of how real energy-based weapons would work. They are merely stand-ins for "real" guns to appease media watchdogs or to establish a show as being futuristic.

There actually are "real lasers" in weapons research and development — like the Airborne Laser and THEL. These lasers are supposed to burn through targets (like missiles) and cause their fuel/warhead to explode or their airframe to disintegrate when it hits, although this is also a continuous beam and requires some time to work. Solid-state pulsed lasers are also in development, which fire bursts of energy and are lighter than fluid-based lasers, but harder to cool. Not to mention that the heat from a powerful laser wouldn't just burn through clothing or make a neat, bloodless, pin-sized hole. There's a common misconception that laser beams cauterize wounds, but real laser wounds are every bit as bloody as knife wounds. It can also cause the water in the body to boil, expand and rip the surrounding tissues apart, much like a high velocity bullet impact. There are also electrolasers under development, which ionize the air so that electric current can be sent along the beam's path.

Incidentally, plasma weapons fire superheated gas; this is different from lasers, which are light beams. Necessarily, plasma weapons can't use light speed projectiles as, having mass, they would be susceptible to all sorts of physics that make approaching the speed of light arbitrarily difficult. Practically a trope in and of itself, plasma weapons are almost always depicted as producing ludicrous glowy puffballs (often green) that somehow avoid mixing into the air, sometimes Hand Waved as magically autogenerated magnetic containment. An actual plasma weapon would be as useful as a gun that shoots steam.

Though, to be fair, guns (and even arrows unless you're in Bullet Time) might as well be instantaneous on a human scale, due to the speeds involved.

For those keeping score, the title of this trope comes from an otherwise unrelated line in the first Austin Powers movie. For really frickin big laser beams, see Wave Motion Gun. For real handguns bowdlerized into energy guns, see Where Did They Get Lasers? If it's Raygun Gothic, it's probably a Death Ray.

Occasionally misspelled "lazer" in fiction, commonly to differentiate from actual LASERs. Frequently mispelled "lazer" in real life, because people are dumb, or because it's easier to copyright names that aren't real words. In reality, the name "L.A.S.E.R." is an acronym of "Light Amplification by Stimulated Emission of Radiation".


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