The drawing "Grown Up Dinner" has some emotions, and it has some wierd thoughts of mine. Besides all the sex going on in the drawing as well as affection, I was thinking about rainbows. I have drawn hundreds of rainbows, and I have always drawn them like rainbows. Yesterday, however, I looked at my rainbow and thought "Why do rainbows end?" I have thought this before, and I can only assume that they don't. So I extended it into a circle because I felt like it. In the end, it worked for several reasons.
Since then, I have been wondering a lot of things. Okay, I think I get the curvature in the sky because of the shape of water molecules as opposed to the linear visible spectrum through a prism. Does one shape more 'correctly' display the spectrum? Does a rainbow truly go 'round like a circle?
Assuming there is a rainbow circle, is it really a circle, or is it concave/convex (I get these reversed) like a bowl? Could it ever be a sphere?
Does the shape of the spectrum reveal the shape of other molecules?
Someone probably already knows the answers to these questions. Feel free to share the info via comments. Thanks.