(08-12-2016, 07:30 PM)Koen Gh. wrote: You are not allowed to view links. Register or Login to view.Handy link, JKP. Hmm, those early rainbows are really all over the place. I'm surprised that they apparently only saw particular colors in them, often blues, yellows and greens.
Some of them originate from clouds, but I haven't seen ones with those dangling lines like in the VM. You may be right that there's another typical synthesis or ambiguity going on here.
Too right they are all over the place - even many of the later ones.
RED is at the top, guys, unless it's a double rainbow, then the top one has reversed colours.
0/10 for observation for the artists.
The VMS picture with the double rainbows and green at the top of both is the best evidence ever (if we needed it) that neither Bacon nor any other scholar of optics had anything to do with the VMS. Bacon experimented with crystals and was the first to calculate the maximum angle of 42 degrees for a real rainbow. The double appears 10 degrees from the first.
The VMS picture is so wrong that the author could have known little about 15C optics. Theodoric of Freidburg (1307) provided a complete and correct theoretical analysis of primary and secondary rainbows 100 years earlier.
I think we can also rule out the idea that the author was an early inventor of the microscope.
Sure you can invoke the heavy painter as a later figure to explain the colours but the angles are still all wrong.
My 2c worth - please shoot me down if I am wrong here.