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Gaokao Physics Practice Question

2. (6 分) 为了探测引力波, “天琴计划”预计发射地球卫星 $P$, 其轨道半径约为 地球半径的 16 倍; 另一地球卫星 $\mathrm{Q}$ 的轨道半径约为地球半径的 4 倍。 $\mathrm{P}$ 与 $\mathrm{Q}$ 的周期之比约为 $(\quad)$

  1. A.$2: 1$
  2. B.4: 1
  3. C.$8: 1$
  4. D.$16: 1$

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