sorry, the first link I gave may have an error in it. This works http://www.holisticsciencejournal.co.uk/id/In_dialogue%20Goethes%20Farbenlehre%20Grebe-Ellis%20and%20Passon.pdf
Harry On Sat, Oct 31, 2020 at 1:30 PM H LV <hveeder...@gmail.com> wrote: > I was beginning to feel like a legend in my own mind, but it seems that in > recent years other people have been making measurements of Goethe`s dark > spectrum with modern instruments. This paper provides some context for > Goethe`s work on colour theory and includes a graph of the spectral > radiance curve of Goethe`s dark spectrum. Roughly speaking Newton`s light > spectrum of blue-green-red emerges from a prism when it is stuck by light > beam within a field of dark, whereas Goethe`s dark spectrum of > yellow-magenta-cyan emerges from a prism when it is struck by a shadow beam > within in a field of light. > > I imagined there must be an infra-cyan and ultra-yellow beyond the visible > part of Geothe`s dark spectrum so I was pleased to see those same terms are > used in this paper. For those people who who turned off by the name of the > journal and think all metaphysical jargon is woo-woo gooble-de-gook, I > suggest you focus on the figures and the data: > > Goethe’s Farbenlehre from the Perspective of Modern Physics > > http://www.holisticsciencejournal.co.uk/id/In_dialogue Goethes > Farbenlehre Grebe-Ellis and Passon.pdf > > The key finding is in the last figure which shows the spectral radiance > curves for both the Newton light spectrum and the Goethe dark spectrum. > Where the Newton spectral radiance curve peaks sharply in the infrared, > there is a correspondingly pronounced dip in the Goethe spectral radiance > curve in the infracyan. > > This paper on the same spectral radiance measurements might be more > appealing for some: > > https://arxiv.org/abs/1706.09063 > > Power Area Density in Inverse Spectra > Matthias Rang, Johannes Grebe-Ellis > Abstract > <<In recent years, inverse spectra were investigated with imaging optics > and a quantitative description with radiometric units was suggested (Rang > 2015). It could be shown that inverse spectra complement each other > additively to a constant intensity level. Since optical intensity in > radiometric units is a power area density, it can be expected that energy > densities of inverse spectra also fulfill an inversion equation and > complement each other. In this contribution we report findings on a > measurement of the power area density of inverse spectra for the near > ultraviolet, visible and the infrared spectral range. They show the > existence of corresponding spectral regions ultra-yellow (UY) and > infra-cyan (IC) in the inverted spectrum and thereby present additional > experimental evidence for equivalence of inverse spectra beyond the visible > range.>> > > Harry >
