OverviewRainbows are the most well known and common of all the Sun Effects. Rainbows form when the sun is below 42° in the sky and there is an isolated shower or thunderstorm directly opposite the sun. Rainbows can also be formed by falling water. Another Sun Effect is a Halo. A Halo is formed by refracted light passing through ice crystals in cirriform clouds that lie between the light source and observer. The ice crystals responsible for forming cirriform clouds are usually found high in the troposphere. Ice-crystal formations require temperatures of 0° F (17.8° C) or lower to form. Haloes are a good indication of bad weather coming. If you have any more information on Sun Effects please let me know so that I can improve this page, and feel free to attach your own sun effects photos. Images
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