What is Light beam?
[[File:Light Amplification by Stimulated Emission of Radiation.jpg|thumb|Laser beams]] A [[light]] beam or beam of light is a small projection of light energy coming from a source into a beam. Sunlight is a natural example of a light beam when it crosses through various objects ([[clouds]], foliage, [[window]]s, etc.). To produce fake light, a [[lamp]] and a parabolic reflector is used in many lighting devices such as spotlights, car [[headlights]]. Light from certain types of [[laser]]s has the smallest possible beam width, so it produces the most parallel light beams possible. [[Category:Optics]]