On April 17, 2021, a solar halo over the city of Lhasa in the Tibet Autonomous Region. Photo by Li Heng
On April 28, 2021, a solar halo over Shenzha County, Nagqu City, Tibet Autonomous Region. Photo by Zhao Yao
On April 28, 2021, a solar halo over the city of Lhasa in the Tibet Autonomous Region. Since April, there have been 22 degrees of solar halo in many places in the Tibet Autonomous Region, a circle of colored rings surrounding the sun, inner infrared blue, very good (grab) to see (eye).
On April 28, 2021, the little turtle that netizens would fly photographed at the Changdu Vocational and Technical School in the Tibet Autonomous Region.
On April 28, 2021, the sun halo over Selin in Nagqu City, Tibet Autonomous Region, was seen. Wang Yuanyuan said that the solar halo is a very common atmospheric optical phenomenon, its cause is derived from the hexagonal prismatic crystal in the high sky, the solar light will refract when it passes through this ice crystal, because the angle of refraction of different colors of light is different, the light through the ice crystal after the color will be separated, so the formation of the inner infrared blue color halo.
On April 28, 2021, netizen Nana Nuni photographed a sun halo in karo district of Changdu City, Tibet Autonomous Region.
On April 28, 2021, a sun halo was seen over the Potala Palace Square in Lhasa, Tibet Autonomous Region. Photo by Jadan
On April 29, 2021, netizen Muxing photographed a sun halo in Bayi District, Nyingchi City, Tibet Autonomous Region.
Why is it called 22 degrees of halo? EasyNight (Simple Night Sky) annotates this diagram.
Only one circle feels slightly monotonous? Don't be afraid, this is not spring, if you happen to have dandelions at hand, you can superimpose unexpected surprises.
A 22-degree solar halo + dandelion interference rainbow and fine object reflection aura photographed in Lhasa, Tibet Autonomous Region, on April 17, 2021. Photo by Jadan
How can someone else's dandelion be so versatile? You can too!
Block the dandelion directly in front of the sun's light source, and you can shoot the "interference rainbow" and the "fine object reflection aura".
A 22-degree solar halo + dandelion interference rainbow and fine object reflection aura taken in Lhasa, Tibet Autonomous Region, on April 28, 2021. Photo by Nima Tashi
Among them, the formation of interference iridescence is due to the extremely fine silk hairs of dandelions, which cause diffraction, which leads to colorful interference fringes; as for the fine object reflection ring, as long as it is a small densely intertwined object, a similar phenomenon can be produced.
Today's knowledge point, have you got it?
(Source: Learning Power Reporter Jia Dan Nima Tashi Correspondent Ji Yun)