What is the arch?

Circovzenhal arc is a fascinating atmospheric phenomenon, sometimes called a reverse rainbow, because at first glance it really resembles a duze back or upside down. Many observers are missing on arches because they are directly above their heads; Astronomers quote an arch arch as another reason people are looking for more, as if the stars were not enough. Unlike the rainbow that appears opposite the Sun, the arch is concentrated around the zenite of the sky and can only occur if the sun angle is less than 32 degrees.

In order for the right to create a peripheral arch, small, flat, six -sided ice crystals must be suspended high in the sky to form a field of small prisms. The sun's rays enter the ice crystals and reflect through them and project the arch in the sky that, if it were complete, would circle zenite. However, completely circular peripheral arches are rare; Most of them occupy only sectuion of the sky looked like a smile that looked intolů from heaven. The arc arc remains until the solar angle has changed if the weather conditions change dramatically.

The color of the peripheral arch is also perverted from the colors of the rainbow; The purple end of the spectrum is closer to the zenite of the sky, while the red range is closest to the country. Technically, Red Range is still at the top of the arch, but because the arch turns, the colors seem to be upside down. Looking at the arch arc, observers may notice sun dogs, another atmospheric phenomenon, because the conditions that predominate to allow the creation of peripheral arches are also optimal for sun dogs.

In most cases, the arc will take at least half an hour and sometimes more time to admire and photograph a beautiful arch. Are most common in colder climates where ice crystals tend to be collected in the sky with abundance, although they can be seen in mild zones, especially during colder weather. As with the rainbow, it is also possible to see the arch from the interior of the aircraft, although it can be difficult to distinguish from the rainbow due to the unique angle from which the observer can be seen.