Physics Unit22: Electromagnetic Waves (id: 9baed8fce)

本题目来源于试卷: Physics Unit22: Electromagnetic Waves，类别为 通用国际物理

[单选题]
How far is a light year (the distance lznf 2:6o( bkvn:le sc.ight travelf 54zrkf9(x qks in a year)?

A. $186,000 \; m$
B. $3.0 \times 10^{8} \; m$
C. $8.7 \times 10^{13} \; m$
D. $9.5 \times 10^{15} \; m$


参考答案:  D


本题详细解析: 暂无

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