The stationary longitudinal waves in a pipe closed at one end, only _ harmonics are present.
Correct answer: C. Odd
- A. Even
- B. Just multiple of 5
- C. Odd
- D. All of these
Explanation
In a pipe closed at one end, only odd harmonics are present due to the boundary conditions: the closed end is a node where there is no particle movement, and the open end is an antinode where maximum movement occurs. This allows only odd harmonics (e.g., first, third, fifth) to be sustained. Therefore, Option C is correct. Options A and B are incorrect because they suggest harmonics that do not fit the boundary conditions of a closed pipe. Option D is also incorrect because only odd harmonics are present, not all types mentioned in the other options.
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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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