An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.
A form of violent crowd behavior which expresses the emotional release of resentments and prejudices, usually relevant to grievances toward the social system.
Here are entered works on literature, art, music, motion pictures, etc. produced for a mass audience. General works on learning and scholarship, literature, the arts, etc. are entered under Intellectual life. --subdivision In popular culture under names of countries, cities, etc., and under names of individual deities, mythological or legendary figures, and fictitious characters