Physics Unit33: Astrophysics and Cosmology (id: c21af7245)

本题目来源于试卷: Physics Unit33: Astrophysics and Cosmology，类别为 通用国际物理

[单选题]
The Sun has apparentm a-x9od 4u hn vbo4ynz+(70h 8acv1ka u x 8jk6zxur7mbwe0 -*brightness 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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