本题目来源于试卷: Physics Unit33: Astrophysics and Cosmology，类别为 Generic Physics
[单选题]
The Sun has apparent brightne4+-uou,):rts/wj, sgo ip:nbhhtzc/cg l 9o8ss at Eartls/s 58+uhblt h ($1.5 \times 10^{8} \; km$ away) of B. What would be the apparent brightness of the Sun at Pluto, which is $6.0 \times 10^{9} \; km$ from the Sun?
A. $0.25 \; B$
B. $0.063 \; B$
C. $0.025 \; B$
D. $0.00063 \; B$
参考答案: D
本题详细解析:
暂无
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Post time 2024-1-22 00:41:59