The distance between two consecutive nodes in a stationary wave is
Correct answer: B. half a wavelength
- 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.
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About Stationary Waves
Stationary waves form when two waves of the same frequency and amplitude travel in opposite directions and interfere. The topic covers nodes, antinodes, wavelength, phase, resonance, and the allowed frequencies on strings and in air columns. Unlike progressive waves, stationary waves do not transfer energy from one point to another.
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