Sorry Bob, I shouldn't have referred to my little ad hoc experiment as an "investigation". It was more like, "What if I look at a lime light with a hand held spectroscope to see what's there?" What I saw was what you'd expect to see: Dim calcium and hydrogen lines along with the ever-present sodium double D lines due to contamination. All this was nearly obscured by the bright continuous incandescent spectrum.
On Wednesday, July 29, 2020, 03:03:51 PM UTC, bobcook39...@hotmail.com <bobcook39...@hotmail.com> wrote: Michael— Is your investigation of limelight written up? If so, it would be good to identify an accessible reference. Two questions that I had relative to the investigation you note: What instrument did you use to determine the spectrum and what was the range of frequency you were able to investigate/determine wit the instrument? Bob Cook
