Re: UV visibility (Re: [vsnet-chat 1284] Re: V3885 Sgr, this season) Berto Monard wrote: > Some years ago I 'tested' this UV vision together with a former > colleague, now happily retired and playing golf on the Cape Coast. We > found that we noticed certain 'violetish' light originating from a > UV-A source (medium pressure Hg lamp) which was fitted with an extra > UV-A filter for additional blockage. I had an interesting experience with my colleagues. When looking through the Johnson U filter, one of my colleagues called it "completely black", while I could see the purple light. Probably this may have originated from the personal difference of UV sensitivity. Through Kron-Cousins I filter, I could only preceive very faintly. Once in my career in physics experiment course, I could visually measure a number of violet lines through a visual spectrometer, but don't remember their exact wavelengths. > PS and a possible answer to 'How do you think?' is: > by means of a dynamic neural flow with stages of temporary storage, > some turbulence and lots of chaos (at least in my brain)... Well, this may be exactly what is working in CV observers 'how do I observe'. But there seems to be a static neural flow towards outbursts, with equal lots of turbulence and chaos within me... Regards, Taichi Kato