本题目来源于试卷: Physics Unit33: Astrophysics and Cosmology,类别为 Generic Physics
[单选题]
The Sun has apparentd/a1u: vxzgkl / (kk-h brightne+-lkusfq* i:x h;rnlw:w/ cp4 8c lm6zss at Earth ($1.5 \times 10^{8} \; km$ 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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