作者Laoda245566 ()
看板Physics
標題Fw: [問題] 量子力學一題
時間Sun Apr 6 15:12:41 2014
※ [本文轉錄自 Chemistry 看板 #1JGDnZBW ]
作者: Laoda245566 () 看板: Chemistry
標題: [問題] 量子力學一題
時間: Sun Apr 6 12:47:29 2014
Suppose that you designed a spacecraft to work by
photon pressure. The sail was a completely absorbing fabric
of area 1.0 km^2 and you directed a red laser beam of wavelength 650 nm
on to it from a base on the Moon. What is the force?
我想從動量變化量去推
不過不知道時間的變數
請問這題該如何下手?
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1F：推 sunev:這比較像普物的問題，不過沒給雷射強度怎麼算? 04/06 13:11
2F：→ Laoda245566:不知 這全部題目了 04/06 13:28
※ 發信站: 批踢踢實業坊(ptt.cc)
※ 轉錄者: Laoda245566 (1.171.166.152), 04/06/2014 15:12:41
3F：推 fishpool:要有雷射的強度才能算,不然是算一顆或自己假設吧 04/06 15:27