The wave in which crest and trough superimpose each other is:
Correct answer: C. Stationary wave
- A. Sound wave
- B. Light wave
- C. Stationary wave
- D. All of these
Explanation
Stationary waves, also known as standing waves, are formed by the combination of two waves with the same frequency and amplitude, moving in opposite directions. When these waves superimpose at some points, the energy is added. For instance, if a crest is superimposed by a crest, or a trough is superimposed by a trough, an antinode is observed. Alternatively, at some points, the energies may be canceled out/ For instance, a crest can be superimposed by a trough or vice versa, forming a node.
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About Waves
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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