A stationary source of sound produce wave of wavelength L and speed v. Now, the source moves away from the observer. What is the wavelength and speed of the sound as measured by the observer?
Correct answer: B. Wavelength increases and speed does not change
- A. Wavelength decreases and speed does not change
- B. Wavelength increases and speed does not change
- C. Wavelength increases and speed increases
- D. Wavelength increases and speed decreases
Explanation
According to wave equation: v = f ƛ Here , ƛ = v/f As the source moves away from observer , the frequency decrease and speed of sound is constant . That will lead to an increase in wavelength.
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Progressive waves transfer energy through a medium or space while particles oscillate about their equilibrium positions. The work includes amplitude, wavelength, frequency, period, phase difference, wave speed and the progressive wave equation, while distinguishing travelling waves from stationary waves, where the pattern has fixed nodes and antinodes.
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