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发表于 6-10-2013 09:45 AM
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猪哥量 发表于 11-8-2013 07:45 AM 
想問这大自然象征是怎樣形成的?
只要注意看你post 上来的图,就会发现其实“圆盘”是七彩的。
Sundogs, also known as mock suns or "parhelia", are a pair of brightly colored spots, one on either side of the sun.
A circumhorizontal arc is an optical phenomenon similar in appearance to a rainbow, caused by the refraction of light through the ice crystals in cirrus clouds. It occurs only when the sun is high in the sky, at least 58° above the horizon. The phenomenon is quite rare, since the ice crystals must be aligned horizontally (instead of the more typical vertical alignment) to reflect. (Wikipedia)
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