Posted: Sun Jul 31, 2005 3:19 amPiratis wrote:Question: Whats a black light? I never really understood this term.
It is used at day time. Turning on a black light makes the room dark. It is based on the black hole technology.
Thats the expensive 'black light'. The cheap ones are just lights that give off ultra violet light that makes thing 'glow'
http://science.howstuffworks.com/black-light.htm
