When sound waves move from one medium to another, the quantity which remains unchanged is
Correct answer: B. Frequency
- A. Wavelength
- B. Frequency
- C. Speed
- D. Intensity
Explanation
The frequency of sound waves remains constant when moving between different median summary, the correct option is **b. Frequency** for the quantity that remains unchanged.
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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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