A vibration generator creates a progressive wave on a rope. The diagram shows the rope at a particular moment. The wave moves with a speed of $4.0\,\text{m s}^{-1}$. What are the wavelength and frequency for this wave?
- Awavelength $= 0.13\,\text{m}$, frequency $= 15\,\text{Hz}$
- Bwavelength $= 0.13\,\text{m}$, frequency $= 30\,\text{Hz}$
- Cwavelength $= 0.27\,\text{m}$, frequency $= 15\,\text{Hz}$
- Dwavelength $= 0.27\,\text{m}$, frequency $= 30\,\text{Hz}$