rainbow occurs because the sun shines on the dew tetesan2x, usually occurs in the atmosphere after the rain. MOONBOW less common, only visible at night when the moon is at a low point during the full moon until almost full. One popular place to see the MOON BOW is in waterfall Cumberland in Kentucky USA.
It is difficult for human eyes to distinguish colors in light moonbow because it is usually too weak to stimulate the cone receptors in the human eye color. As a result, they often appear white. However, the colors in a moonbow do appear in photographs of long exposure.
A colored circle around the moon is not moonbow-usually 22 ° produced by refraction through hexagonal ice crystals in cirrus clouds. Colored ring near the moon is the corona, a diffraction phenomenon produced by very small water droplets or ice crystals in clouds.
Moonbows most easily seen when the moon is near full (when it's light). For other than those produced by the waterfall, the moon must be low in the sky (less than 42 degrees and lower) and have a dark sky. And of course there must be rain as opposed to months. This combination makes moonbows requirements are much more rare than the rainbows produced by the sun.
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