國立自然科學博物館

當月光穿過小水滴時，會產生繞射現象，因各色光的繞射角度不同，在月亮周圍形成內藍外紅的光環，稱為月暈。每朵雲的小水滴大小不盡相同，月華也總有著不同的面貌，就如同明月與高積雲的相互爭鬥下，形成特殊的大氣光象。

When moonlight passes through water droplets, there is diffraction. Angles of diffraction differ depending on the color of light. As such, there is blue light on the inside and red light on the outside of this moon halo. Water droplets inside a cloud vary in size, creating variations in the lunar corona, just like the unique atmospheric optimal phenomenon that results from the battle between bright moon and altocumulus clouds.

謝承安-明暗相爭1