A UV light, say at 244 nm or 300 nm, can not be seen at all with a human eye. However if you put a piece of paper in its path the paper will glow blue. This happens because the UV excites blue dyes in the paper (the paper manufacturers put blue dyes in all papers to make them appear more 'white'). This also happens to your white shirts when you walk under a 'dark UV lamp' in a disco bar or in one of those stores that sell glow in the dark stuff.
For more see http://chemistry.about.com/cs/howthingswork/f/blblacklight.htm On Mon, Aug 25, 2014 at 10:59 PM, Jack Cole <[email protected]> wrote: > Hi Axil, > > I can give that a try. What would you expect to see and how will we know > if UV is emitted? > > Best, > Jack > > > > On Mon, Aug 25, 2014 at 8:55 PM, Axil Axil <[email protected]> wrote: > >> Dear Jack, >> >> >> >> I would be interested in seeing what happens when some chlorine bleach is >> used instead of water. >> >> >> >> Chlorine produces a UV laser output when combined with hydrogen in an >> arc. Mills uses chlorine and so did Papp. >> >> >> >> >> On Mon, Aug 25, 2014 at 9:15 PM, Jack Cole <[email protected]> wrote: >> >>> Hi Folks, >>> >>> I was excited to receive my spot welder today. After ensuring it was in >>> working order, I decided to get right to it and see if I could get anything >>> like what BLP showed. Lo and behold I got something on the first try. >>> >>> I remembered Mills talking about all the different possibilities for >>> types of conductors that they might use in the commercial device, and >>> copper was one of them. I cut a very small piece of copper wire, dipped it >>> in water, placed it on the electrodes, hit the switch, and pop with some >>> bright light! >>> >>> Here's a link to the vid. Sorry for the bad camera work. >>> >>> Let me know what you think. I'll do another vid soon in complete >>> darkness. >>> >>> http://youtu.be/d6XYqEhwZgA >>> >>> Jack >>> >> >> >
