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Question: Answered & Verified by Expert
If at same temperature and pressure, the densities for two diatomic gases are respectively $d_1$ and $d_2$, then the ratio of velocities of sound in these gases will be
PhysicsWaves and SoundJEE Main
Options:
  • A $\sqrt{\frac{d_2}{d_1}}$
  • B $\sqrt{\frac{d_1}{d_2}}$
  • C $d_1 d_2$
  • D $\sqrt{d_1 d_2}$
Solution:
2915 Upvotes Verified Answer
The correct answer is: $\sqrt{\frac{d_2}{d_1}}$
Speed of sound
$v=\sqrt{\frac{\gamma P}{d}} \Rightarrow \frac{v_1}{v_2}=\sqrt{\frac{d_2}{d_1}} \quad(\ P-$ constant)

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