Glories from Close and Distant Clouds近距与远距星云的光辉
These glories were observed on an Atlanta to Toronto flight through clouds which were sometimes very close, sometimes distant. The size of the aircraft shadow depends upon the distance to the cloud, so when the cloud is close, the shadow is large. The size of the glory is determined by the size of the droplets in the cloud since it arises from diffraction from the water droplets. If the droplets are the same size, the glory for close and distant clouds is the same size as viewed by the eye. 这些光辉是在从亚特兰大飞往多伦多的航班上通过云层观测到的,这些云层有时非常接近,有时则很远。飞机阴影的大小取决于到云层的距离,因此当云层接近时,阴影会更大。光辉的大小由云中水滴的大小决定,因为它是由于水滴的衍射产生的。如果水滴大小相同,那么近处和远处的云层所形成的光辉大小在人眼看来是一样的。
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Index Atmospheric optics concepts 索引:大气光学概念 | ||
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