The distance between two consecutive nodes in a stationary wave is
- A. one wavelength
- B. half a wavelength
- C. a quarter of a wavelength
- D. two wavelengths
Explanation
Nodes recur every half wavelength, with an antinode midway between each pair, so measuring the node separation is the standard way of finding the wavelength in a laboratory experiment. The distance from a node to the neighbouring antinode is therefore a quarter of a wavelength. Doubling the node separation gives the full wavelength.