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White Rainbow
Fog bow (white rainbow) - rainbow, representing a wide arc of brilliant white, due to refraction and dispersion of light in very small droplets vody.
It appears when lighting the weak sunlight mist of droplets radius of about 25 μ.
Lack of color painting like a conventional rainbow due to the relatively small size of the water droplets. The inner side of a white rainbow may be slightly colored in purple, and external - in orange. Sometimes incorrectly called white rainbow moon radugu.
Source: ru.wikipedia.org/wiki/%D2%F3%EC%E0%ED%ED%E0%FF_%F0%E0%E4%F3%E3%E0
