moonbow
Sign in to saveAlso known as lunar rainbow, white rainbow
A moonbow (also known as a moon rainbow or lunar rainbow) is a rainbow produced by moonlight rather than direct sunlight. Other than the difference in the light source, its formation is the same as for a solar rainbow: It is caused by the refraction of light in many water droplets, such as a rain shower or a waterfall, and is always positioned in the opposite part of the sky from the Moon relative to the observer. thumbnail|Lunar rainbow over Kihei, Hawaii|Kihei, [[Maui, Hawaii, US]] Moonbows are much fainter than solar rainbows, due to the smaller amount of light reflected from the surface of
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A moonbow (also known as a moon rainbow or lunar rainbow) is a rainbow produced by moonlight rather than direct sunlight. Other than the difference in the light source, its formation is the same as for a solar rainbow: It is caused by the refraction of light in many water droplets, such as a rain shower or a waterfall, and is always positioned in the opposite part of the sky from the Moon relative to the observer. thumbnail|Lunar rainbow over Kihei, Hawaii|Kihei, [[Maui, Hawaii, US]] Moonbows are much fainter than solar rainbows, due to the smaller amount of light reflected from the surface of the Moon. Because the light is usually too faint to excite the cone color receptors in human eyes, it is difficult for the human eye to discern colors in a moonbow. As a result, a moonbow often appears to be white. However, the colors in a moonbow do appear in long exposure photographs.
Moonbows have been mentioned at least since Aristotle's Meteorology (circa 350 BC), and are associated with the ancient Greek Lunar goddess, Selene.