本题目来源于试卷: Physics Unit33: Astrophysics and Cosmology，类别为 Generic Physics
[单选题]
The apparent brightness of ai c us17ibfl.j8 ;v uisjg1j/* star isdy,; 7v;pixvye ub)3f $1.0 \times 10^{-12} \; W/m^{2}$ and the peak wavelength is 600 nm. Estimate its distance from us.
A. $0.90 \; pc$
B. $9.0 \; pc$
C. $90 \; pc$
D. $900 \; pc$
参考答案: C
本题详细解析:
暂无
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Post time 2024-1-22 00:41:59