传说中,彩虹象征什么?

Where Do Rainbows Come From?

Throughout history, rainbows have been a source of mystery and legend. Rainbows are also important symbols in a number of cultures around the world.

In the Old Testament¹ of the Bible, for example, God shows Noah a rainbow to let him know that the Flood is over and that he will never destroy the earth again with flooding. An ancient Mayan book also tells of a rainbow signaling a new age after the destruction of the earth.

In a myth from Germany, the rainbow is the palette that God used to paint the birds. Some Native American groups believed that rainbows were made from wild flowers. In other traditions, the rainbow is the hem² of a particular god's coat.

In an ancient Japanese myth, the rainbow is a bridge from heaven to earth. The first man and woman walked down this bridge to learn the ways of the world.

Today, we know exactly how rainbows are made. In the seventeenth century, the scientist Isaac Newton and the mathematician³ and philosopher Rene Descartes analyzed⁴ them very carefully. They concluded that rainbows were caused when sunlight was broken up as it passed through raindrops.

When it rains, the colors that make up white light separate because they bend at different angles when they pass through water. The result is the full spectrum⁵ of colors the human eye can see, as well as some that it cannot; at the outermost⁶ edges of a rainbow lie ultraviolet and infrared⁷ light.

 

1 testament   

n.遗嘱；证明

参考例句：

• This is his last will and testament.这是他的遗愿和遗嘱。
• It is a testament to the power of political mythology.这说明，编造政治神话可以产生多大的威力。

2 hem   

n.贴边，镶边；vt.缝贴边；(in)包围，限制

参考例句：

• The hem on her skirt needs sewing.她裙子上的褶边需要缝一缝。
• The hem of your dress needs to be let down an inch.你衣服的折边有必要放长1英寸。

3 mathematician   

n.数学家

参考例句：

• The man with his back to the camera is a mathematician.背对着照相机的人是位数学家。
• The mathematician analyzed his figures again.这位数学家再次分析研究了他的这些数字。

4 analyzed   

v.分析( analyze的过去式和过去分词 )；分解；解释；对…进行心理分析

参考例句：

• The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
• The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程，因为对他来说，爱是个不可分析的迷。 来自《简明英汉词典》

5 spectrum   

n.谱，光谱，频谱；范围，幅度，系列

参考例句：

• This is a kind of atomic spectrum.这是一种原子光谱。
• We have known much of the constitution of the solar spectrum.关于太阳光谱的构成，我们已了解不少。

6 outermost   

adj.最外面的，远离中心的

参考例句：

• He fired and hit the outermost ring of the target.他开枪射中了靶子的最外一环。
• The outermost electron is shielded from the nucleus.原子核对最外层电子的作用受到屏蔽。

7 infrared   

adj./n.红外线(的)

参考例句：

• Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
• Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。