The diagram illustrates an experiment used to create a stationary wave in an air column. A tuning fork positioned above the column oscillates and generates a sound wave. By changing the amount of water in the tube, the length of the air column can be adjusted. The tube is first filled, and then the water is permitted to flow out. The first two stationary waves are formed when the air column lengths are $0.14\,\text{m}$ and $0.42\,\text{m}$. What is the wavelength of the sound wave?
- A$0.14\,\text{m}$
- B$0.28\,\text{m}$
- C$0.42\,\text{m}$
- D$0.56\,\text{m}$