挪威上空的圆彩虹
(原标题: A Full Circle Rainbow over Norway)
2022-12-27
浏览次数: 16
你见过整个彩虹吗？从地面上看，通常只有彩虹的顶部是可见的，因为朝向地面的方向雨滴较少。然而，从空中看，整个360度的彩虹圈更常见。9月，一架穿越阵雨的无人机在挪威罗弗敦群岛上空捕捉到了一圈完整的彩虹。彩虹是一种依赖观测者的现象，主要是由雨滴对阳光的内部反射引起的，彩虹的全直径为84度。太阳与彩虹中心的方向完全相反。作为奖励，第二道彩虹更微弱，颜色也相反，在第一道彩虹之外可见。
查看原文解释
Have you ever seen an entire rainbow? From the ground, typically, only the top portion of a rainbow is visible because directions toward the ground have fewer raindrops. From the air, though, the entire 360-degree circle of a rainbow is more commonly visible. Pictured here, a full-circle rainbow was captured over the Lofoten Islands of Norway in September by a drone passing through a rain shower. An observer-dependent phenomenon primarily caused by the internal reflection of sunlight by raindrops, the rainbow has a full diameter of 84 degrees. The Sun is in the exact opposite direction from the rainbow's center. As a bonus, a second rainbow that was more faint and color-reversed was visible outside the first.
© Lukas Moesch