Two planets move around the sun. The periodic times and the mean radii of the orbits are ${T_1},\,{T_2}$ and ${r_1},\,{r_2}$ respectively. The ratio ${T_1}/{T_2}$ is equal to
Two planets move around the sun. The periodic times and the mean radii of the orbits are ${T_1},\,{T_2}$ and ${r_1},\,{r_2}$ respectively. The ratio ${T_1}/{T_2}$ is equal to
- A
${({r_1}/{r_2})^{1/2}}$
- B
${r_1}/{r_2}$
- C
${({r_1}/{r_2})^2}$
- D
${({r_1}/{r_2})^{3/2}}$
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