A sound wave moves with speed $1500\,\text{m s}^{-1}$ and frequency $2500\,\text{Hz}$. Find the smallest separation between a point of maximum pressure in the wave and a point of minimum pressure.
- A$0.15\,\text{m}$
- B$0.30\,\text{m}$
- C$0.60\,\text{m}$
- D$1.20\,\text{m}$