他說陽光照射在一個微小的星體上，星體就會受熱，然後把熱力再輻射出去
那麼什麼叫把熱力再輻射出去??
請問一下熱力是否等於輻射??
還是熱力要透過輻射放出來??
會的請幫幫助回答~謝謝!!!!!!!!!!!!!!!
更新1:
不太明白 那熱力是否等於輻射
輻射的一些問題~~~~~~~~
2011-01-18 2:48 am
有一個利用雅科夫斯基效應來改變小行星的運行軌道
他說陽光照射在一個微小的星體上，星體就會受熱，然後把熱力再輻射出去
那麼什麼叫把熱力再輻射出去??
請問一下熱力是否等於輻射??
還是熱力要透過輻射放出來??
會的請幫幫助回答~謝謝!!!!!!!!!!!!!!!
他說陽光照射在一個微小的星體上，星體就會受熱，然後把熱力再輻射出去
那麼什麼叫把熱力再輻射出去??
請問一下熱力是否等於輻射??
還是熱力要透過輻射放出來??
會的請幫幫助回答~謝謝!!!!!!!!!!!!!!!
回答 (2)
2011-01-22 6:38 am
✔ 最佳答案
熱傳遞主要有三種方式，分別是傳導,對流,輻射熱輻射，是一種物體用電磁輻射的形式把熱能向外散發的熱傳方式。它不依賴任何外界條件而進行。它是熱的三種主要傳導方式之一。
因為太空沒有空氣所以不能以傳導,對流散發熱能。
2011-01-18 4:19 am
Simply speaking, it is "infrared radiation"(紅外線). The higher the temperature of a surface, the emitted infared radiation will be of higher intensity and shorter wavelength.
Thus when a small asteroid is heated up evenly on its surface, the amount of infared radiation emitted on the hot side is larger than that on the cool side. This leads to a change in rotational speed of the asteroid, and thus its orbit.
Thus when a small asteroid is heated up evenly on its surface, the amount of infared radiation emitted on the hot side is larger than that on the cool side. This leads to a change in rotational speed of the asteroid, and thus its orbit.
收錄日期: 2021-04-29 17:46:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110117000051KK00932