<< Previous Puzzle Monday, July 11, 2011 Newer Puzzle >>

Infrared


Do you remember the days when switching TV channels meant getting up from your couch and pressing buttons on the TV? Infrared light is electromagnetic radiation that the human eye can't see. It's what TV remote controls typically use for communication. And it works reflected through mirrors too.
See Also: http://en.wikipedia.org/wiki/Infrared

link to this puzzle

No comments:

Post a Comment