incoherent light...
2005-11-22 by jonesalley
As one who has worked with lasers for many years, you'd be amazed at what the general public thinks are lasers - combine a mirror ball and a fog machine, and people will argue for hours that it is a laser show. Even the small moving-pattern disco spots that many clubs use are perceived as lasers by many. Sad how scientifically illiterate the average person is. And, almost any large laser is water-cooled - they develop a tremendous amount of heat. We actually had to run hoses from the nearest bathroom into the planetarium to host an OmniScan (full-dome laser projector) demo a few years ago.