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
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→ o810418:學測還是模擬考我看過這種題目 要用動量下手.. 04/07 10:31
→ o810418:沒intensity就沒得算了的樣子吧QQ 04/07 10:32
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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