Lee R L
Appl Opt. 1991 Aug 20;30(24):3401-7. doi: 10.1364/AO.30.003401.
Both folklore and theory imply that naturally occurring rainbows display a wide range of nearly pure colors. However, digital image analysis of color slides shows that the natural rainbow's colors are not especially pure and that the bow's background causes much of this desaturation.
民间传说和理论都表明,自然形成的彩虹呈现出一系列几乎纯净的颜色。然而,对彩色幻灯片的数字图像分析表明,自然彩虹的颜色并非特别纯净,而且彩虹的背景是造成这种色彩饱和度降低的主要原因。