A standing wave pattern is formed when the length of string is an integral multiple of wavelength.
Correct answer: C. Half.
- A. Triple.
- B. Full.
- C. Half.
- D. Double.
Explanation
Standing or stationary waves are formed when the vibrating medium is made to vibrate giving rise to a waveform without displacing the medium, the medium displays the wavelength of the waveform, which is confined to the length of the spring (normally the medium used). The equation L= n λ/2 shows length being half of the wavelength, where n is the harmonic, n=1 first fundamental, n=2 second fundamental.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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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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