The source of sound s is moving with a velocity 50 m / s towards a stationary observer. The obs

step 1 The given data of the question is, as the source of a sound as moving with velocity, VS means th

The source of sound s is moving with a velocity 50 m / s...

The source of sound $\mathrm{s}$ is moving with a velocity $50 \mathrm{~m} / \mathrm{s}$ towards a stationary observer. The observer measures the frequency of the source as $1000 \mathrm{~Hz}$. What will be the apparent frequency of the source when it is moving away from the observer after crossing him ? The velocity of sound in the medium is $350 \mathrm{~m} / \mathrm{s}$ [MP PM (a) $750 \mathrm{~Hz}$ (b) $857 \mathrm{~Hz}$ (c) $1143 \mathrm{~Hz}$ (d) $1333 \mathrm{~Hz}$

The source of sound $\mathrm{s}$ is moving with a velocity $50 \mathrm{~m} / \mathrm{s}$ towards a stationary observer. The observer measures the frequency of the source as $1000 \mathrm{~Hz}$. What will be the apparent frequency of the source when it is moving away from the observer after crossing him ? The velocity of sound in the medium is $350 \mathrm{~m} / \mathrm{s}$ [MP PM
(a) $750 \mathrm{~Hz}$
(b) $857 \mathrm{~Hz}$
(c) $1143 \mathrm{~Hz}$
(d) $1333 \mathrm{~Hz}$

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Key Concepts

Doppler Effect

The Doppler effect describes the change in frequency or wavelength of a wave relative to an observer when the source of the wave is moving. It explains why the observed frequency is higher when the source is moving towards the observer and lower when moving away.

Relative Motion

Relative motion between the source and the observer is central to understanding the Doppler effect. The movement of the source with respect to the stationary observer alters the perceived frequency depending on whether it is approaching or receding.

Wave Propagation in a Medium

Sound waves require a medium for propagation, and the speed of sound in that medium plays an important role in quantifying the frequency shift due to the Doppler effect. The medium's properties help determine how quickly the wave travels and how the movement of the source affects the wavelength as experienced by the observer.

Frequency Shift Equations

Frequency shift equations provide a mathematical framework to calculate the observed frequency when either the source or the observer is in motion. These equations take into account the speed of the source relative to the speed of sound and are essential for analyzing situations involving moving sound sources.

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