反反射光：西班牙上空的彩虹扇
(原标题: Anticrepuscular Rays: A Rainbow Fan over Spain)
2025-02-04
浏览次数: 64
是的，但你的彩虹能做到吗？当天晚些时候，太阳照常向西落下。然而，在这一天，更有趣的展示是180度旋转-朝向东方。在那里，不仅可以看到彩虹，而且从彩虹中心发出的反反射光也令人印象深刻。在这张来自西班牙北部莱凯提奥的特色照片中，太阳在相机后面。彩虹是由雨水反射回来的阳光形成的。反反射光来自阳光，被一些云层阻挡，穿过天空，在头顶上，似乎汇聚在相反的地平线上——这是一种光学错觉。彩虹本身是令人兴奋的，而反反射光是一种罕见的享受，但将它们同时捕捉到更是不寻常的——看起来既宁静又超现实。拼图挑战：当天的天文学难题
查看原文解释
Yes, but can your rainbow do this? Late in the day, the Sun set as usual toward the west. However, on this day, the more interesting display was 180 degrees around -- toward the east. There, not only was a rainbow visible, but an impressive display of anticrepuscular rays from the rainbow's center. In the featured image from Lekeitio in northern Spain, the Sun is behind the camera. The rainbow resulted from sunlight reflecting back from falling rain. Anticrepuscular rays result from sunlight, blocked by some clouds, going all the way around the sky, overhead, and appearing to converge on the opposite horizon -- an optical illusion. Rainbows by themselves can be exciting to see, and anticrepuscular rays a rare treat, but capturing them both together is even more unusual -- and can look both serene and surreal. Jigsaw Challenge: Astronomy Puzzle of the Day
© Julene Eiguren