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Dewbow
A dewbow is an optical effect, similar to a rainbow where the dewdrops reflect and disperse sunlight, producing all the colours in the visible spectrum. ==Occurrence==
Although rare, dewbows are most common in autumn, when dewdrops form on a dense network of spiderwebs (or rarely on walls, grasses and other vegetation), where the dew hanging on the webs acts like rain, and diffracts the light. 〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Dewbow」の詳細全文を読む
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