男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

您現在的位置: > Language Tips > Easy English > Odd Question  
 





  What is a rainbow?
[ 2006-04-20 09:21 ]

A rainbow is merely a large band of parallel stripes, blended at the rims, which displays the full spectrum of colors that make up the sun's white light. This brilliant display appears to the naked eye when the sun's light breaks up as it passes through, the prism-like raindrops during a rain-shower.

This immense, curved spectrum of light appears only when both the elements of sunshine and rainfall present. As the sunlight enters the falling raindrops, it breaks up into its true colors of red, orange, yellow, blue, and violet. These colors are always arranged according to their wavelengths, with red being at one end of the spectrum, and violet at the other. Once inside the droplet, the particles of colored light bounce from side to side, reflect off of the far side of the droplet, exit the droplet, and reassemble, according to their wavelengths, to form a rainbow.

Simply because you happen to be in the right place at the right time, when both elements necessary to form a rainbow are present, does not mean that you will actually see one. For the human eye to see these multi-colored bands, ranging from red to violet, his body must be strategically positioned between the sun and the rain, with his back to the sun.

If the sun, the eye, and the center of the rainbow's arc are not in a straight line, the show is over, before it began. This explains why we only see rainbows in the early morning or late afternoon…it is physically impossible for us to align our eyes with the sun at other times of day, as it is high above our heads! Logically, a morning rainbow appears when the sun shines in the east, and the rain falls in the west, and an afternoon rainbow appears when the sun shines in the west, and the rain falls in the east.

parallel: 平行的
stripe: 條紋
spectrum: 光譜

prism-like: 象棱鏡一樣的

 

curved: 彎曲的

 


wavelength:
波長

 
 
 




主站蜘蛛池模板: 仙居县| 清苑县| 武穴市| 东辽县| 磐安县| 息烽县| 休宁县| 平原县| 咸宁市| 德庆县| 易门县| 阿拉尔市| 颍上县| 马关县| 卢龙县| 浙江省| 顺昌县| 汝州市| 内黄县| 朝阳县| 翁牛特旗| 磐安县| 乌鲁木齐市| 手游| 贵南县| 越西县| 沾化县| 缙云县| 蛟河市| 抚顺县| 卓尼县| 盐亭县| 庐江县| 浪卡子县| 始兴县| 五河县| 铁岭市| 庄浪县| 濮阳市| 曲阳县| 通城县|