本题目来源于试卷: Nuclear & Quantum Physics E.2 Quantum Physics，类别为 IB物理学
[单选题]
In a laboratory experl5qj5mqfx ugsd . 1v(+(/fu bbime:byilo67 )gxjnt, $n$ moles of photons of wavelength $λ$ are normally incident every second per square meter on a solar sail. Which of the following expressions correctly states the photo-pressure on the solar sail, given that the photons are reflected elastically.
A. $\frac{h}{λ}$
B. $\frac{2h}{λ}$
C. $(n)(N_A)\frac{h}{λ}$
D. $(n)(N_A)\frac{2h}{λ}$
参考答案: D
本题详细解析:
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