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白天的天空呈現藍色是因為一種名為瑞利散射的科學現象。
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You have probably looked up at the sky on a sunny day and were amazed that it was so blue. But have you ever wondered why the sky appears to be this color? Why isn’t it green or purple?
The blue color of the daytime sky is due to a scientific phenomenon called Rayleigh scattering. It’s when sunlight entering the Earth’s atmosphere interacts with gas molecules such as nitrogen and oxygen, causing the light to scatter in all directions. The blue color we see is caused by the shorter wavelength of blue light, which is scattered more than other colors of light by the small gas molecules. As a result, blue light dominates the light we see, giving the sky its blue hue. Violet actually has the shortest wavelength, but since our eyes are less sensitive to violet light, the sky doesn’t appear purple.
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單字片語整理
Words in Use
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hue
[hju]
色調
●
daytime
[ˋde͵taɪm]
n. 白天（不可數）
●
sunlight
[ˋsʌn͵laɪt]
n. 日光，陽光（不可數）
●
nitrogen
[ˋnaɪtrədʒən]
n. 氮（氣）
●
wavelength
[ˋwev͵lɛŋθ]
n. 波長
●
absorption
[əbˋsɔrpʃən]
n. 吸收
Practical Phrases
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interact with
與……互動
Tom interacts well with other kids at school.
湯姆在學校和其他的小朋友互動良好。
●
be sensitive to
對某事物很敏感，很容易因某事物而被 冒犯
Fred is sensitive to others’ remarks.
弗瑞德對別人的話很敏感。
Don’t mention Donald’s missing dog―he’s very sensitive about that.
不要提到唐納德走失的狗 — 他對那件事非常敏感。
●
play a role in
在⋯⋯發揮重要作用，在⋯⋯方面扮演重要角色
The parents played a role in the education of their children.
這對父母在他們孩子的教育方面扮演重要角色。
●
bounce off...
自⋯⋯彈回來
●
water vapor
水蒸氣
The doctor used water vapor to treat my sore throat.
醫生用水蒸氣來治療我的喉嚨痛。
●
a magnetic field
磁場
●
visible light
可見光
●
the naked eye
肉眼
本篇內容出自《常春藤解析/生活英語雜誌》，
2025/06/16 00:00 前買享優惠
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