source=
http://www.piclist.com/postbot.asp?id=piclist\2002\02\17\092929a

"equipment who can detect visible light." ???

Err... that would be a photocell or photodiode? Try typing those
words in at
http://www.google.com

In general you are not getting answers because no-one understands
what you want to know ABOUT "equipment who can detect
visible light."


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