The difference between lunar halo and moonlight.

The difference between lunar halo and yuet is as follows:

Lunar halo is an optical phenomenon in nature. Moonlight is a diffraction phenomenon. Lunar halo is a kind of light that is refracted by ice crystals when passing through the cirrostratus at high altitude, so that the seven-color composite light is dispersed into internal infrared purple halo or light arc, and an aperture is generated around the moon. Moonlight is the diffraction of moonlight through ice crystals or water droplets with uniform size in transparent thin clouds.

Why is there a halo?

We call this aperture around the sun or moon "halo". The aperture around the sun is called solar halo, and the aperture around the moon is called lunar halo, which is a common meteorological phenomenon. The color of the halo is generally internal infrared violet, forming a colored halo. When the moonlight passes through the ice crystals in the clouds, the refracted light forms an aperture around the moon.

Sometimes it has a silver hole. These "halos" are actually cirrostratus. When cold air meets warm and humid air, it will form rain clouds. At this time, the sky is very cold, and the water droplets are frozen into hexagonal ice crystals. When the moonlight shines on these ice crystals at night, a lunar halo is formed. There are large and small circles in the lunar halo, which only appears at the edge of the moon.

Explanation of halo

Halo is an optical phenomenon formed by the refraction or reflection of sunlight or moonlight by ice crystals suspended in the atmosphere. When light enters the ice crystals in cirrostratus, it is refracted twice and dispersed into light of various colors in different directions. When there is cirrostratus, there are countless ice crystals floating in the sky. Ice crystals in the same circle around the sun can refract the same color light into our eyes, forming a halo of internal infrared violet.

Halo is usually ring-shaped or arc-shaped, with seven colors: red, orange, yellow, green, blue, indigo and purple. The reflection of ice crystals irradiated by the sun on human eyes is called "solar halo", and the reflection of ice crystals irradiated by the moon on human eyes is called "lunar halo". Ice crystals in the atmosphere are usually brought by cirrus clouds. When sunlight enters the ice crystal, it will be reflected to the human eye, producing a circular or arc coil, usually with red light in the inner ring and purple light in the outer ring.

Yuehua related phenomenon

Moon Bay is a colorful halo around the moon, which is formed by the diffraction of water droplets or ice crystals in the cloud, with ultraviolet rays and red inside.

Moonlight, moonlight

Wang Xiaowei, a Miscellaneous Poem by Liang Jiangyan in the Southern Dynasties: "Yin Qing is far away, and the moon is scattered. Zhang Tang Xu Ruo's poem "Moonlit Night on a Spring River" said: "At this time, I don't know each other. I hope China shines on you every month. "The fifth and ninth chapters of The Water Margin:" [Song Jiang and others] are high on the hillside, and immediately look at the city. It was the weather in mid-February, the moonlight was like a day, and there were no clouds in the sky. " Duanmu Hongliang's Rapids of the Hun River: "In particular, the moonlight is scattered on the surface of the Hun River like graupel, which is quiet, fragrant and cool. "

moon

Yu Xin's poem "Looking at the Moon in the Boat" in the Northern Zhou Dynasty: "Leave home at night and look at the bright moon." The poem "Tao Lian pian" in Wei Zhuang, the former Shu Dynasty said: "The moonlight shines brightly, and the prostitutes sing Yi Dao songs." The word "Tai Cheng Dao Shang Yuan" written by Nalan Xingde in Qing Dynasty: "Do it and knock it. Ask about the fiber at the bottom of the curtain. See you again. I don't understand acacia, and Yuehua is full tonight. " Guo Moruo's eighth poem "Bottle": "I believe this is not a crime. Has Baiyun been destroyed when holding Yuet Wah? "

Moon essence

The essence of the moon. Copy an article from Taiping Jing: "The formula of word of mouth is 42%: ... Yue Hua Wu." Song Fat Yuan Ying's Miscellanies of Wenchang Volume 1: "Assistant Minister Xie Gong of the Ministry of Rites said that there is a method of raising pearls. Take today's fake pearls, pick bright and round ones, soak them in clear water, and when their mouths open, throw them away in a hurry, change the clear water frequently, and set them in the middle of the moon at night. After playing for two autumns, it will become a real pearl. "

Colored rings around the moon

It is caused by the diffraction of the moon's light through small water droplets or tiny ice crystals in the clouds. Feng Ming Yingjing's "Moon Order Generalized August Order": "The brilliance of the moon often comes from the night of Mid-Autumn Festival, or the night of 14th and 16th, or the night of 13th, 17th and 18th. The shape of moonlight, like brocade clouds holding pearls, is bright and beautiful in five colors, just like embroidery. At the time of Huasheng, the moon was as dry as a golden basin, but it was not bright, and it was scattered when it moved. The cover is common, not unusual, and the novel mistakenly regards the moon as China and disappears. " Qian Qing chanted "Walking in the Garden, Amazing": "In the 19th year of Jiaqing, on the 13th, 14th and 15th nights of the first month, there was moonlight for everyone to see." Yuan Mei's Poems with the Garden in the Qing Dynasty (Volume 15): "I've heard people say' Yue Hua' since I was a child, but I've never seen it.