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the source of energy能量的來源

來源:apple 編輯:apple 時間:2017-12-19
the source of energy能量的來源
the source of energy
  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 liberated at the center of the sun as billions upon billions of nuclei hydrogen atoms clash with each other and fuse together to form 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.Thus the sun has been doing for several thousands of millions of years.
      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 remitted at slightly longer wavelengths.This radiation in its turn,is absorbed and remitted.As the energy filters through the layers of Solar inner,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 given off in such direction that,after passing unhindered through interplanetary space,it hits the earth.

能量的來源
  生命的物理和化學性質的總結必須開始,而不是在地球上而是在陽光下;事實上,在太陽的中心。正是在這里,才能找到太陽不斷涌出的能量的來源這些能量在太陽中心釋放出來,億萬億核子氫原子相互碰撞并融合在一起形成原子核。太陽的光和熱的輸出需要一些每秒能有6億噸氫氣在太陽下轉化為氦氣,太陽已經做了好幾千萬年。
      核能在太陽中心釋放為高能量的伽馬輻射,這種電磁輻射如光波和無線電波,只有非常短的波長。這種伽瑪輻射被太陽內部的原子吸收,稍微匯回更長的波長,這種輻射又被吸收和消除。當能量穿過太陽內層時,它穿過光譜的X射線部分,最終變成光。在這個階段,它已經達到了我們稱太陽表面,并且可以逃逸到太空中,而不被太陽原子進一步吸收。太陽的光和熱的一小部分以這樣的方向發出,在通過行星際空間不受阻礙地穿過地球之后。

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