When the source of sound is moving towards the observer at rest, _ increases.
Correct answer: A. Frequency
- A. Frequency
- B. Speed of sound
- C. Amplitude
- D. Wavelength
Explanation
Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer. If the source of sound is coming towards a stationary observer, the frequency will increase.
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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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