手机版

The source of Energy

阅读 :

  A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun's very center. It is here that is to be found the source of the energy that the Sun constantly pours out into space as light and heat. This energy is librated at the center of the Sun as billions upon billions of nuclei of hydrogen atoms collide with each other and fuse together to form nuclei of helium, and in doing so, release some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600 million tons of hydrogen be converted into helium in the Sun every second. This the Sun has been doing for several thousands of millions of year.

  The nuclear energy is released at the Sun's center as high-energy gamma radiation, a form of electromagnetic radiation like light and radio waves, only of very much shorter wavelength. This gamma radiation is absorbed by atoms inside the Sun to be reemitted at slightly longer wavelengths. This radiation , in its turn is absorbed and reemitted. As the energy filters through the layers of the solar interior, it passes through the X-ray part of the spectrum eventually becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small fraction of the Sun's light and heat is emitted in such directions that after passing unhindered through interplanetary space, it hits the Earth.

更多 英文美文英语美文英文短文英语短文,请继续关注 英语作文大全

文化 散文
本文标题:The source of Energy - 英语短文_英语美文_英文美文
本文地址:http://www.dioenglish.com/writing/essay/42943.html

相关文章

  • A Boy and His Tree 男孩和树

    A long time ago, there was a huge apple tree. A little boy loved to come and play around it every day. He climbed to the tree top, ate the apples, took a nap under the shadow… He loved the tree...

    2018-12-09 英语短文
  • Run Freely 自由奔跑

    A Lesson About Courage 小丫:“从婴儿到少年,从少年到青年……我们在不断成长,同时我们也在不断失去。知识在增长,阅历在增加,我们越来越有城府,越来越顾虑重重,越来越迷失自我。因为经验,我们戴上了生活的虚假面...

    2018-12-09 英语短文
  • Mutability

    原诗欣赏Mutability by Percy Bysshe Shelley IThe flower that smiles to-dayTo-morrow dies;All that we wish to stayTempts and then flies.What is this world's delight?Lightning that mocks the night,Br...

    2019-02-05 英语短文
  • 新约--启示录(Revelation) -- 第20章

      20:1 我又看见一位天使从天降下,手里拿着无底坑的钥匙,和一条大链子。  And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.  20:2 他捉住那龙...

    2018-12-13 英语短文
  • 放下玻璃杯

    玻璃杯A lecturer was giving a lecture to his student on stress management. He raised a glass of water and asked the audience, ”How heavy do you think this glass of water is?” The students’ answer...

    2019-01-31 英语短文
  • 送给挚爱的母亲(三)

      Growing Old and Gray  When you were 19, she paid for your college tuition, drove you to campus, carried your bags. You thanked her by saying good-bye outside the dorm so you wouldn't be em...

    2018-12-14 英语短文
  • 咖啡与枪共存

    星巴克Dale Welch走进位于弗吉尼亚州的一家星巴克,腰上别着手枪的他点了一杯香蕉星冰乐外加一份肉桂小面包。他称至少有一位顾客忍不住再次打量了一下他的枪,但咖啡师们并未做出偷看的举动。 Dale Welch recently wal...

    2019-02-01 英语短文
  • 写给离家的孩子:妈妈能有多么爱你

      They’re gone now。  他们已经走了。  I stood in the driveway and watched my grown children drive off into the distance. I looked down the road until I could no longer see thei...

    2019-03-06 英语短文
  • 尊重自己:学会说不懂得拒绝

      After I had my second child, I wanted to show my boss I could handle anything. I said yes to coming back too soon and working the overnight shift! I was so beat, I fell down the stairs...

    2019-03-15 英语短文
  • 日常生活中的科学冷知识

    日常生活中的冷知识,你知道多少?...

    2019-01-26 英语短文
你可能感兴趣