Question
Types of these phenomena are named for the 22-degree or 46-degree angles of minimum deviation that give rise to them. For 10 points each:
[10h] Name these refraction patterns around the Sun and Moon that are visible from Earth. Sun dogs and light pillars are types of these phenomena, which are formed by ice crystals in the atmosphere refracting light.
ANSWER: halos [accept 22-degree halos or 46-degree halos; prompt on rings or Bottlinger’s ring]
[10e] Halos are often caused by the ice crystals that compose these clouds, which have “fibratus” and “castellanus” types. These thin, wispy clouds are usually contrasted with stratus and cumulus clouds.
ANSWER: cirrus clouds
[10m] Halos can also form as a rainbow in a quarter-circle around this point in the celestial sphere, which is located directly above one’s head.
ANSWER: zenith
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Summary
| 2024 ACF Winter at UC Berkeley | 2024-11-16 | Y | 3 | 13.33 | 67% | 67% | 0% |
| 2024 ACF Winter at Clemson | 2024-11-16 | Y | 7 | 12.86 | 100% | 14% | 14% |
| 2024 ACF Winter at Northwestern | 2024-11-16 | Y | 10 | 14.00 | 90% | 30% | 20% |
| 2024 ACF Winter at Ohio State | 2024-11-16 | Y | 7 | 21.43 | 71% | 43% | 100% |
| 2024 ACF Winter at Ohio State | 2024-11-16 | Y | 7 | 12.86 | 86% | 14% | 29% |
| 2024 ACF Winter at Online | 2024-11-16 | Y | 8 | 13.75 | 88% | 38% | 13% |
| 2024 ACF Winter at UBC | 2024-11-16 | Y | 3 | 16.67 | 100% | 33% | 33% |
| 2024 ACF Winter at Central Florida | 2024-11-16 | Y | 5 | 16.00 | 100% | 40% | 20% |
| 2024 ACF Winter at Oxford | 2024-11-16 | Y | 10 | 20.00 | 90% | 50% | 60% |