Question

Sound waves from a point source are propagating in all direction. What will be the ratio of amplitudes at distance of 9 m to 25 m from the source?

Answer 1

Intensity = (Amplitude)² ∝ \(\frac{1}{{(distance)}^2}\)

∴  Amplitude ∝ \(\frac{1}{Distance}\)

Hence, \(\frac{A_1}{A_2}=\frac{r_2}{r_1}=\frac{25}{9}\)