At the open end of an organ pipe:
Correct answer: C. Antinodes are formed
- A. Nodes are formed
- B. Nodes and antinodes may be formed
- C. Antinodes are formed
- D. Neither node nor antinode is formed
Explanation
An open end allows maximum air motion (displacement antinode) and minimum pressure variation, so an antinode forms at each open end.
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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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