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Cloud iridescence and coronas are both caused by diffraction processes .

云层的彩虹色和日华都是由阳光的衍射所产生的。

The costs of melanin-based plumage and iridescence are clearly different from this .

黑色素翅膀和彩虹色翅膀的代价与上面却完全不同。

When sunlight or moonlight passes through a layer of thin clouds , the result can be iridescence .

阳光或月光穿过薄薄的云层就会形成虹彩。

Tags communicate iridescence colors angle perception to attract pollinators .

沟通彩虹颜色角度吸引传粉媒介。

Note that the cumulus clouds at right ( lower altitude ) are composed of droplets of generally larger sizes and show no iridescence .

请注意，照片右面低海拔的积云通常由较大尺寸水滴所组成，不再具有彩虹的色彩。