Directed-energy weapons are those that transfer energy to a target without the use of a projectile. Types of energy used or proposed for such weapons include sound, radio, light, particles, and plasma—all of which could be used for a number of different applications, including destroying targets, causing disorientation, or disabling machinery. Although many so-called energy weapons are the stuff of science fiction, some are in development or even in limited use. What are some examples? Discuss
Source: The Free Dictionary