北京上空出現日暈

「日暈三更雨，月暈午時風」，春夏之交是最易出現日暈的季節。最近這段時間在首都北京、江西分宜、福建廈門等地均出現了日暈現象，極大地滿足了人們的好奇心。而且還有一個奇特的現象是，在我國最近幾年偶數年份如2016、2018、2020都出現了日暈，而奇數年2017、2019卻沒有，所以很好奇2021年會不會也沒有日暈呢？

日暈及日暈三更雨到底是什麼科學現象呢？咱們先來欣賞一下日暈的美景：

像不像彩虹一樣有著紅、橙、黃、綠、青、藍、紫七道彩光呢？所以呢，日暈本質上就是陽光通過了一個三稜鏡把日光分解成了七彩光。

雨水的形成是因為水蒸氣在空中遇冷，凝結成雲，當雲層中的水滴增到到不能繼續懸浮在空氣中時就形成了雨水。所以日暈後有雨，說明空中有雲。雲層中有冰晶，就是三稜鏡。日光通過冰晶雲層就折射出七彩光帶，人們就看到了日暈。

美麗的日暈總是為人們所喜愛，每次出現這一奇特的自然現象，人們總是不遺餘力地採集各種各樣的照片分享給愛好者們，滿足大家對神奇大自然魅力的偏愛。

古代人們不能認識日暈的原理，視其為一種不祥之兆，預示著災禍如戰爭、武力、陰陽不合等等。其中最為大家熟悉的典故就是「白虹貫日」說的就是臣下弒君的亂象，臣為虹、君為日，與之相應的最出名的刺客故事就是「聶政刺韓相」和「荊軻刺秦王」。

不過到唐宋年代，人們對日暈虹的認識已經接近現在的認識了。比如唐代詩人張志和，不僅寫出了「斜風細雨不須歸」的名句，而且還著書說明了模擬成虹的實驗方法「背日噴湖水，成虹霓之狀，而不可直者，齊乎影也」。所以古時的峨嵋佛光、虹霓之彩、星月之暈、五色之雲等等指的都是類似的稜鏡分解日光的現象。

質量就在我們身邊，解讀自然現象也一樣適用。誰會聯想到北京上空的日暈與古人口中神奇的長虹貫日竟是同一種物理現象呢？但是，從古至今，大家發自內心的需求確實一樣的，除了現場欣賞，還想盡辦法用文字、詩句、照片和實驗等各種方法記錄和分享自己的發現，不遺餘力地觀察和解讀這種現象背後的規律，不斷提升人類認識自然的能力。

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Spring and summer is the most likely season of halo. Recently, people in Beijing, fenyi jiangxi province and xiamen, fujian province, have enjoyed the phenomenon of solar meteorology and it has greatly satisfied people&39;re curious about whether there&39;s take a look at the beauty of the halo.

It is like a rainbow with red, orange, yellow, green, blue, purple these colors, so the solar halo is essentially that the sun pass a three-prism then sun is broken into colorful light.

The cause of the rain is that water vapor cools in the air and condenses into clouds, forming rain when water droplets in the clouds can&34;the white rainbow&34;Nie Zheng assassinated the Han Xiang&34;Jing Ke assassinated Ying Zheng.&39;s principle as scientific as present. The Tang dynasty poet Zhang Zhihe, not only had good poetry, but also wrote the book to illustrate the experimental method of simulating rainbow formation. So in ancient times, the color of emei, the color of the rainbow, the halo of the star moon, the clouds of five colors and so on are the similar phenomena.

Quality is all around us. The same is true of natural phenomena. Who would associate the halo of the sun above Beijing with the ancient &34;? But, from the ancient times, the needs of our heart are the same. In addition to the scene appreciation, we tried to record and share findings with words, lines, photos and experiments, and we have been able to observe and read the rules behind this phenomenon, and to improve the ability of humans to recognize nature.

Our mission, to disseminate quality ideas and promote quality improvement. Invest 10 minutes every day, and we strive to build high quality life with you.